[openib-general] [PATCH RFC 05/10] ofed_1_2 Backport cxgb3 to2.6.15
Vladimir Sokolovsky
vlad at dev.mellanox.co.il
Fri Jan 19 09:50:09 PST 2007
Applied.
Regards,
Vladimir
On Thu, 2007-01-18 at 13:23 -0600, Steve Wise wrote:
> Here is what I've coded up. It compiles ok on staging.openfabrics.org.
> You can pull this from
>
> git://staging.openfabrics.org/~swise/ofed_1_2 ofed_1_2
>
> Steve.
>
> ----
>
> commit b46734fae0a7b519ce22569cce4f5ba2df33aa77
> Author: Steve Wise <swise at hosting.openfabrics.org>
> Date: Thu Jan 18 11:07:29 2007 -0800
>
> Backport to 2.6.15_ubuntu606
>
> This is the kernel.org 2.6.15 backport with a few tweaks:
>
> - recasting addr paramater for __set_bit() and __clear_bit()
> - removed backport for __netif_rx_schedule_prep()
>
> Signed-off-by: Steve Wise <swise at opengridcomputing.com>
>
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/asm/bitops.h b/kernel_addons/backport/2.6.15_ubuntu606/include/asm/bitops.h
> new file mode 100644
> index 0000000..58ebe41
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/asm/bitops.h
> @@ -0,0 +1,20 @@
> +#ifndef BACKPORT_ASM_BITOPS_TO_2_6_15_UBUNTU606
> +#define BACKPORT_ASM_BITOPS_TO_2_6_15_UBUNTU606
> +
> +#include_next <asm/bitops.h>
> +
> +static __inline__ void __backport_set_bit(int nr, void * addr)
> +{
> + __set_bit(nr, (volatile void *)addr);
> +}
> +
> +#define __set_bit __backport_set_bit
> +
> +static __inline__ void __backport_clear_bit(int nr, void * addr)
> +{
> + __clear_bit(nr, (volatile void *)addr);
> +}
> +
> +#define __clear_bit __backport_clear_bit
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/bitops.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/bitops.h
> new file mode 100644
> index 0000000..d9752fc
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/bitops.h
> @@ -0,0 +1,24 @@
> +#include_next <linux/bitops.h>
> +#ifndef LINUX_BITOPS_BACKPORT_2_6_15
> +#define LINUX_BITOPS_BACKPORT_2_6_15
> +
> +static inline int fls64(__u64 x)
> +{
> + __u32 h = x >> 32;
> + if (h)
> + return fls(h) + 32;
> + return fls(x);
> +}
> +
> +#endif
> +#ifndef LINUX_BITOPS_BACKPORT_2_6_16
> +#define LINUX_BITOPS_BACKPORT_2_6_16
> +
> +static inline unsigned fls_long(unsigned long l)
> +{
> + if (sizeof(l) == 4)
> + return fls(l);
> + return fls64(l);
> +}
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/device.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/device.h
> new file mode 100644
> index 0000000..324f20e
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/device.h
> @@ -0,0 +1,9 @@
> +#ifndef LINUX_DEVICE_BACKPORT_H
> +#define LINUX_DEVICE_BACKPORT_H
> +
> +#include_next <linux/device.h>
> +
> +#define add_uevent_var add_hotplug_env_var
> +#define uevent hotplug
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/fs.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/fs.h
> new file mode 100644
> index 0000000..f0631fb
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/fs.h
> @@ -0,0 +1,8 @@
> +#ifndef BACKPORT_LINUX_FS_H
> +#define BACKPORT_LINUX_FS_H
> +
> +#include_next <linux/fs.h>
> +
> +#define i_private u.generic_ip
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/genalloc.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/genalloc.h
> new file mode 100644
> index 0000000..3c23c68
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/genalloc.h
> @@ -0,0 +1,42 @@
> +/*
> + * Basic general purpose allocator for managing special purpose memory
> + * not managed by the regular kmalloc/kfree interface.
> + * Uses for this includes on-device special memory, uncached memory
> + * etc.
> + *
> + * This source code is licensed under the GNU General Public License,
> + * Version 2. See the file COPYING for more details.
> + */
> +
> +
> +/*
> + * General purpose special memory pool descriptor.
> + */
> +struct gen_pool {
> + rwlock_t lock;
> + struct list_head chunks; /* list of chunks in this pool */
> + int min_alloc_order; /* minimum allocation order */
> +};
> +
> +/*
> + * General purpose special memory pool chunk descriptor.
> + */
> +struct gen_pool_chunk {
> + spinlock_t lock;
> + struct list_head next_chunk; /* next chunk in pool */
> + unsigned long start_addr; /* starting address of memory chunk */
> + unsigned long end_addr; /* ending address of memory chunk */
> + unsigned long bits[0]; /* bitmap for allocating memory chunk */
> +};
> +
> +extern struct gen_pool *ib_gen_pool_create(int, int);
> +extern int ib_gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
> +extern void ib_gen_pool_destroy(struct gen_pool *);
> +extern unsigned long ib_gen_pool_alloc(struct gen_pool *, size_t);
> +extern void ib_gen_pool_free(struct gen_pool *, unsigned long, size_t);
> +
> +#define gen_pool_create ib_gen_pool_create
> +#define gen_pool_add ib_gen_pool_add
> +#define gen_pool_destroy ib_gen_pool_destroy
> +#define gen_pool_alloc ib_gen_pool_alloc
> +#define gen_pool_free ib_gen_pool_free
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/inetdevice.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/inetdevice.h
> new file mode 100644
> index 0000000..7a32313
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/inetdevice.h
> @@ -0,0 +1,28 @@
> +#ifndef _LINUX_INETDEVICE_BACKPORT_TO_2_6_17
> +#define _LINUX_INETDEVICE_BACKPORT_TO_2_6_17
> +
> +#include_next <linux/inetdevice.h>
> +#include <linux/rtnetlink.h>
> +
> +static inline struct net_device *xxx_ip_dev_find(u32 addr)
> +{
> + struct net_device *dev;
> + u32 ip;
> +
> + read_lock(&dev_base_lock);
> + for (dev = dev_base; dev; dev = dev->next) {
> + ip = inet_select_addr(dev, 0, RT_SCOPE_LINK);
> + if (ip == addr) {
> + dev_hold(dev);
> + break;
> + }
> + }
> + read_unlock(&dev_base_lock);
> +
> + return dev;
> +}
> +
> +#define ip_dev_find xxx_ip_dev_find
> +
> +#endif
> +
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/interrupt.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/interrupt.h
> new file mode 100644
> index 0000000..66e66a9
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/interrupt.h
> @@ -0,0 +1,17 @@
> +#ifndef BACKPORT_LINUX_INTERRUPT_TO_2_6_18
> +#define BACKPORT_LINUX_INTERRUPT_TO_2_6_18
> +#include_next <linux/interrupt.h>
> +
> +static inline int
> +backport_request_irq(unsigned int irq,
> + irqreturn_t (*handler)(int, void *),
> + unsigned long flags, const char *dev_name, void *dev_id)
> +{
> + return request_irq(irq,
> + (irqreturn_t (*)(int, void *, struct pt_regs *))handler,
> + flags, dev_name, dev_id);
> +}
> +
> +#define request_irq backport_request_irq
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/kernel.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/kernel.h
> new file mode 100644
> index 0000000..a37dcd5
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/kernel.h
> @@ -0,0 +1,7 @@
> +#ifndef BACKPORT_KERNEL_H_2_6_19
> +#define BACKPORT_KERNEL_H_2_6_19
> +
> +#include_next <linux/kernel.h>
> +#include <linux/log2.h>
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/lockdep.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/lockdep.h
> new file mode 100644
> index 0000000..0c34f36
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/lockdep.h
> @@ -0,0 +1,355 @@
> +/*
> + * Runtime locking correctness validator
> + *
> + * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo at redhat.com>
> + *
> + * see Documentation/lockdep-design.txt for more details.
> + */
> +#ifndef __LINUX_LOCKDEP_H
> +#define __LINUX_LOCKDEP_H
> +
> +#if 0
> +#include <linux/linkage.h>
> +#include <linux/list.h>
> +#include <linux/debug_locks.h>
> +#include <linux/stacktrace.h>
> +#endif
> +
> +#ifdef CONFIG_LOCKDEP
> +
> +/*
> + * Lock-class usage-state bits:
> + */
> +enum lock_usage_bit
> +{
> + LOCK_USED = 0,
> + LOCK_USED_IN_HARDIRQ,
> + LOCK_USED_IN_SOFTIRQ,
> + LOCK_ENABLED_SOFTIRQS,
> + LOCK_ENABLED_HARDIRQS,
> + LOCK_USED_IN_HARDIRQ_READ,
> + LOCK_USED_IN_SOFTIRQ_READ,
> + LOCK_ENABLED_SOFTIRQS_READ,
> + LOCK_ENABLED_HARDIRQS_READ,
> + LOCK_USAGE_STATES
> +};
> +
> +/*
> + * Usage-state bitmasks:
> + */
> +#define LOCKF_USED (1 << LOCK_USED)
> +#define LOCKF_USED_IN_HARDIRQ (1 << LOCK_USED_IN_HARDIRQ)
> +#define LOCKF_USED_IN_SOFTIRQ (1 << LOCK_USED_IN_SOFTIRQ)
> +#define LOCKF_ENABLED_HARDIRQS (1 << LOCK_ENABLED_HARDIRQS)
> +#define LOCKF_ENABLED_SOFTIRQS (1 << LOCK_ENABLED_SOFTIRQS)
> +
> +#define LOCKF_ENABLED_IRQS (LOCKF_ENABLED_HARDIRQS | LOCKF_ENABLED_SOFTIRQS)
> +#define LOCKF_USED_IN_IRQ (LOCKF_USED_IN_HARDIRQ | LOCKF_USED_IN_SOFTIRQ)
> +
> +#define LOCKF_USED_IN_HARDIRQ_READ (1 << LOCK_USED_IN_HARDIRQ_READ)
> +#define LOCKF_USED_IN_SOFTIRQ_READ (1 << LOCK_USED_IN_SOFTIRQ_READ)
> +#define LOCKF_ENABLED_HARDIRQS_READ (1 << LOCK_ENABLED_HARDIRQS_READ)
> +#define LOCKF_ENABLED_SOFTIRQS_READ (1 << LOCK_ENABLED_SOFTIRQS_READ)
> +
> +#define LOCKF_ENABLED_IRQS_READ \
> + (LOCKF_ENABLED_HARDIRQS_READ | LOCKF_ENABLED_SOFTIRQS_READ)
> +#define LOCKF_USED_IN_IRQ_READ \
> + (LOCKF_USED_IN_HARDIRQ_READ | LOCKF_USED_IN_SOFTIRQ_READ)
> +
> +#define MAX_LOCKDEP_SUBCLASSES 8UL
> +
> +/*
> + * Lock-classes are keyed via unique addresses, by embedding the
> + * lockclass-key into the kernel (or module) .data section. (For
> + * static locks we use the lock address itself as the key.)
> + */
> +struct lockdep_subclass_key {
> + char __one_byte;
> +} __attribute__ ((__packed__));
> +
> +struct lock_class_key {
> + struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
> +};
> +
> +/*
> + * The lock-class itself:
> + */
> +struct lock_class {
> + /*
> + * class-hash:
> + */
> + struct list_head hash_entry;
> +
> + /*
> + * global list of all lock-classes:
> + */
> + struct list_head lock_entry;
> +
> + struct lockdep_subclass_key *key;
> + unsigned int subclass;
> +
> + /*
> + * IRQ/softirq usage tracking bits:
> + */
> + unsigned long usage_mask;
> + struct stack_trace usage_traces[LOCK_USAGE_STATES];
> +
> + /*
> + * These fields represent a directed graph of lock dependencies,
> + * to every node we attach a list of "forward" and a list of
> + * "backward" graph nodes.
> + */
> + struct list_head locks_after, locks_before;
> +
> + /*
> + * Generation counter, when doing certain classes of graph walking,
> + * to ensure that we check one node only once:
> + */
> + unsigned int version;
> +
> + /*
> + * Statistics counter:
> + */
> + unsigned long ops;
> +
> + const char *name;
> + int name_version;
> +};
> +
> +/*
> + * Map the lock object (the lock instance) to the lock-class object.
> + * This is embedded into specific lock instances:
> + */
> +struct lockdep_map {
> + struct lock_class_key *key;
> + struct lock_class *class_cache;
> + const char *name;
> +};
> +
> +/*
> + * Every lock has a list of other locks that were taken after it.
> + * We only grow the list, never remove from it:
> + */
> +struct lock_list {
> + struct list_head entry;
> + struct lock_class *class;
> + struct stack_trace trace;
> +};
> +
> +/*
> + * We record lock dependency chains, so that we can cache them:
> + */
> +struct lock_chain {
> + struct list_head entry;
> + u64 chain_key;
> +};
> +
> +struct held_lock {
> + /*
> + * One-way hash of the dependency chain up to this point. We
> + * hash the hashes step by step as the dependency chain grows.
> + *
> + * We use it for dependency-caching and we skip detection
> + * passes and dependency-updates if there is a cache-hit, so
> + * it is absolutely critical for 100% coverage of the validator
> + * to have a unique key value for every unique dependency path
> + * that can occur in the system, to make a unique hash value
> + * as likely as possible - hence the 64-bit width.
> + *
> + * The task struct holds the current hash value (initialized
> + * with zero), here we store the previous hash value:
> + */
> + u64 prev_chain_key;
> + struct lock_class *class;
> + unsigned long acquire_ip;
> + struct lockdep_map *instance;
> +
> + /*
> + * The lock-stack is unified in that the lock chains of interrupt
> + * contexts nest ontop of process context chains, but we 'separate'
> + * the hashes by starting with 0 if we cross into an interrupt
> + * context, and we also keep do not add cross-context lock
> + * dependencies - the lock usage graph walking covers that area
> + * anyway, and we'd just unnecessarily increase the number of
> + * dependencies otherwise. [Note: hardirq and softirq contexts
> + * are separated from each other too.]
> + *
> + * The following field is used to detect when we cross into an
> + * interrupt context:
> + */
> + int irq_context;
> + int trylock;
> + int read;
> + int check;
> + int hardirqs_off;
> +};
> +
> +/*
> + * Initialization, self-test and debugging-output methods:
> + */
> +extern void lockdep_init(void);
> +extern void lockdep_info(void);
> +extern void lockdep_reset(void);
> +extern void lockdep_reset_lock(struct lockdep_map *lock);
> +extern void lockdep_free_key_range(void *start, unsigned long size);
> +
> +extern void lockdep_off(void);
> +extern void lockdep_on(void);
> +extern int lockdep_internal(void);
> +
> +/*
> + * These methods are used by specific locking variants (spinlocks,
> + * rwlocks, mutexes and rwsems) to pass init/acquire/release events
> + * to lockdep:
> + */
> +
> +extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
> + struct lock_class_key *key);
> +
> +/*
> + * Reinitialize a lock key - for cases where there is special locking or
> + * special initialization of locks so that the validator gets the scope
> + * of dependencies wrong: they are either too broad (they need a class-split)
> + * or they are too narrow (they suffer from a false class-split):
> + */
> +#define lockdep_set_class(lock, key) \
> + lockdep_init_map(&(lock)->dep_map, #key, key)
> +#define lockdep_set_class_and_name(lock, key, name) \
> + lockdep_init_map(&(lock)->dep_map, name, key)
> +
> +/*
> + * Acquire a lock.
> + *
> + * Values for "read":
> + *
> + * 0: exclusive (write) acquire
> + * 1: read-acquire (no recursion allowed)
> + * 2: read-acquire with same-instance recursion allowed
> + *
> + * Values for check:
> + *
> + * 0: disabled
> + * 1: simple checks (freeing, held-at-exit-time, etc.)
> + * 2: full validation
> + */
> +extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
> + int trylock, int read, int check, unsigned long ip);
> +
> +extern void lock_release(struct lockdep_map *lock, int nested,
> + unsigned long ip);
> +
> +# define INIT_LOCKDEP .lockdep_recursion = 0,
> +
> +#else /* !LOCKDEP */
> +
> +static inline void lockdep_off(void)
> +{
> +}
> +
> +static inline void lockdep_on(void)
> +{
> +}
> +
> +static inline int lockdep_internal(void)
> +{
> + return 0;
> +}
> +
> +# define lock_acquire(l, s, t, r, c, i) do { } while (0)
> +# define lock_release(l, n, i) do { } while (0)
> +# define lockdep_init() do { } while (0)
> +# define lockdep_info() do { } while (0)
> +# define lockdep_init_map(lock, name, key) do { (void)(key); } while (0)
> +# define lockdep_set_class(lock, key) do { (void)(key); } while (0)
> +# define lockdep_set_class_and_name(lock, key, name) \
> + do { (void)(key); } while (0)
> +# define INIT_LOCKDEP
> +# define lockdep_reset() do { debug_locks = 1; } while (0)
> +# define lockdep_free_key_range(start, size) do { } while (0)
> +/*
> + * The class key takes no space if lockdep is disabled:
> + */
> +struct lock_class_key { };
> +#endif /* !LOCKDEP */
> +
> +#if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_GENERIC_HARDIRQS)
> +extern void early_init_irq_lock_class(void);
> +#else
> +# define early_init_irq_lock_class() do { } while (0)
> +#endif
> +
> +#ifdef CONFIG_TRACE_IRQFLAGS
> +extern void early_boot_irqs_off(void);
> +extern void early_boot_irqs_on(void);
> +#else
> +# define early_boot_irqs_off() do { } while (0)
> +# define early_boot_irqs_on() do { } while (0)
> +#endif
> +
> +/*
> + * For trivial one-depth nesting of a lock-class, the following
> + * global define can be used. (Subsystems with multiple levels
> + * of nesting should define their own lock-nesting subclasses.)
> + */
> +#define SINGLE_DEPTH_NESTING 1
> +
> +/*
> + * Map the dependency ops to NOP or to real lockdep ops, depending
> + * on the per lock-class debug mode:
> + */
> +
> +#ifdef CONFIG_DEBUG_LOCK_ALLOC
> +# ifdef CONFIG_PROVE_LOCKING
> +# define spin_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, i)
> +# else
> +# define spin_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, i)
> +# endif
> +# define spin_release(l, n, i) lock_release(l, n, i)
> +#else
> +# define spin_acquire(l, s, t, i) do { } while (0)
> +# define spin_release(l, n, i) do { } while (0)
> +#endif
> +
> +#ifdef CONFIG_DEBUG_LOCK_ALLOC
> +# ifdef CONFIG_PROVE_LOCKING
> +# define rwlock_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, i)
> +# define rwlock_acquire_read(l, s, t, i) lock_acquire(l, s, t, 2, 2, i)
> +# else
> +# define rwlock_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, i)
> +# define rwlock_acquire_read(l, s, t, i) lock_acquire(l, s, t, 2, 1, i)
> +# endif
> +# define rwlock_release(l, n, i) lock_release(l, n, i)
> +#else
> +# define rwlock_acquire(l, s, t, i) do { } while (0)
> +# define rwlock_acquire_read(l, s, t, i) do { } while (0)
> +# define rwlock_release(l, n, i) do { } while (0)
> +#endif
> +
> +#ifdef CONFIG_DEBUG_LOCK_ALLOC
> +# ifdef CONFIG_PROVE_LOCKING
> +# define mutex_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, i)
> +# else
> +# define mutex_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, i)
> +# endif
> +# define mutex_release(l, n, i) lock_release(l, n, i)
> +#else
> +# define mutex_acquire(l, s, t, i) do { } while (0)
> +# define mutex_release(l, n, i) do { } while (0)
> +#endif
> +
> +#ifdef CONFIG_DEBUG_LOCK_ALLOC
> +# ifdef CONFIG_PROVE_LOCKING
> +# define rwsem_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 2, i)
> +# define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 2, i)
> +# else
> +# define rwsem_acquire(l, s, t, i) lock_acquire(l, s, t, 0, 1, i)
> +# define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 1, i)
> +# endif
> +# define rwsem_release(l, n, i) lock_release(l, n, i)
> +#else
> +# define rwsem_acquire(l, s, t, i) do { } while (0)
> +# define rwsem_acquire_read(l, s, t, i) do { } while (0)
> +# define rwsem_release(l, n, i) do { } while (0)
> +#endif
> +
> +#endif /* __LINUX_LOCKDEP_H */
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/log2.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/log2.h
> new file mode 100644
> index 0000000..d02e1a5
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/log2.h
> @@ -0,0 +1,157 @@
> +/* Integer base 2 logarithm calculation
> + *
> + * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
> + * Written by David Howells (dhowells at redhat.com)
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version
> + * 2 of the License, or (at your option) any later version.
> + */
> +
> +#ifndef _LINUX_LOG2_H
> +#define _LINUX_LOG2_H
> +
> +#include <linux/types.h>
> +#include <linux/bitops.h>
> +
> +/*
> + * deal with unrepresentable constant logarithms
> + */
> +extern __attribute__((const, noreturn))
> +int ____ilog2_NaN(void);
> +
> +/*
> + * non-constant log of base 2 calculators
> + * - the arch may override these in asm/bitops.h if they can be implemented
> + * more efficiently than using fls() and fls64()
> + * - the arch is not required to handle n==0 if implementing the fallback
> + */
> +#ifndef CONFIG_ARCH_HAS_ILOG2_U32
> +static inline __attribute__((const))
> +int __ilog2_u32(u32 n)
> +{
> + return fls(n) - 1;
> +}
> +#endif
> +
> +#ifndef CONFIG_ARCH_HAS_ILOG2_U64
> +static inline __attribute__((const))
> +int __ilog2_u64(u64 n)
> +{
> + return fls64(n) - 1;
> +}
> +#endif
> +
> +/*
> + * round up to nearest power of two
> + */
> +static inline __attribute__((const))
> +unsigned long __roundup_pow_of_two(unsigned long n)
> +{
> + return 1UL << fls_long(n - 1);
> +}
> +
> +/**
> + * ilog2 - log of base 2 of 32-bit or a 64-bit unsigned value
> + * @n - parameter
> + *
> + * constant-capable log of base 2 calculation
> + * - this can be used to initialise global variables from constant data, hence
> + * the massive ternary operator construction
> + *
> + * selects the appropriately-sized optimised version depending on sizeof(n)
> + */
> +#define ilog2(n) \
> +( \
> + __builtin_constant_p(n) ? ( \
> + (n) < 1 ? ____ilog2_NaN() : \
> + (n) & (1ULL << 63) ? 63 : \
> + (n) & (1ULL << 62) ? 62 : \
> + (n) & (1ULL << 61) ? 61 : \
> + (n) & (1ULL << 60) ? 60 : \
> + (n) & (1ULL << 59) ? 59 : \
> + (n) & (1ULL << 58) ? 58 : \
> + (n) & (1ULL << 57) ? 57 : \
> + (n) & (1ULL << 56) ? 56 : \
> + (n) & (1ULL << 55) ? 55 : \
> + (n) & (1ULL << 54) ? 54 : \
> + (n) & (1ULL << 53) ? 53 : \
> + (n) & (1ULL << 52) ? 52 : \
> + (n) & (1ULL << 51) ? 51 : \
> + (n) & (1ULL << 50) ? 50 : \
> + (n) & (1ULL << 49) ? 49 : \
> + (n) & (1ULL << 48) ? 48 : \
> + (n) & (1ULL << 47) ? 47 : \
> + (n) & (1ULL << 46) ? 46 : \
> + (n) & (1ULL << 45) ? 45 : \
> + (n) & (1ULL << 44) ? 44 : \
> + (n) & (1ULL << 43) ? 43 : \
> + (n) & (1ULL << 42) ? 42 : \
> + (n) & (1ULL << 41) ? 41 : \
> + (n) & (1ULL << 40) ? 40 : \
> + (n) & (1ULL << 39) ? 39 : \
> + (n) & (1ULL << 38) ? 38 : \
> + (n) & (1ULL << 37) ? 37 : \
> + (n) & (1ULL << 36) ? 36 : \
> + (n) & (1ULL << 35) ? 35 : \
> + (n) & (1ULL << 34) ? 34 : \
> + (n) & (1ULL << 33) ? 33 : \
> + (n) & (1ULL << 32) ? 32 : \
> + (n) & (1ULL << 31) ? 31 : \
> + (n) & (1ULL << 30) ? 30 : \
> + (n) & (1ULL << 29) ? 29 : \
> + (n) & (1ULL << 28) ? 28 : \
> + (n) & (1ULL << 27) ? 27 : \
> + (n) & (1ULL << 26) ? 26 : \
> + (n) & (1ULL << 25) ? 25 : \
> + (n) & (1ULL << 24) ? 24 : \
> + (n) & (1ULL << 23) ? 23 : \
> + (n) & (1ULL << 22) ? 22 : \
> + (n) & (1ULL << 21) ? 21 : \
> + (n) & (1ULL << 20) ? 20 : \
> + (n) & (1ULL << 19) ? 19 : \
> + (n) & (1ULL << 18) ? 18 : \
> + (n) & (1ULL << 17) ? 17 : \
> + (n) & (1ULL << 16) ? 16 : \
> + (n) & (1ULL << 15) ? 15 : \
> + (n) & (1ULL << 14) ? 14 : \
> + (n) & (1ULL << 13) ? 13 : \
> + (n) & (1ULL << 12) ? 12 : \
> + (n) & (1ULL << 11) ? 11 : \
> + (n) & (1ULL << 10) ? 10 : \
> + (n) & (1ULL << 9) ? 9 : \
> + (n) & (1ULL << 8) ? 8 : \
> + (n) & (1ULL << 7) ? 7 : \
> + (n) & (1ULL << 6) ? 6 : \
> + (n) & (1ULL << 5) ? 5 : \
> + (n) & (1ULL << 4) ? 4 : \
> + (n) & (1ULL << 3) ? 3 : \
> + (n) & (1ULL << 2) ? 2 : \
> + (n) & (1ULL << 1) ? 1 : \
> + (n) & (1ULL << 0) ? 0 : \
> + ____ilog2_NaN() \
> + ) : \
> + (sizeof(n) <= 4) ? \
> + __ilog2_u32(n) : \
> + __ilog2_u64(n) \
> + )
> +
> +/**
> + * roundup_pow_of_two - round the given value up to nearest power of two
> + * @n - parameter
> + *
> + * round the given balue up to the nearest power of two
> + * - the result is undefined when n == 0
> + * - this can be used to initialise global variables from constant data
> + */
> +#define roundup_pow_of_two(n) \
> +( \
> + __builtin_constant_p(n) ? ( \
> + (n == 1) ? 0 : \
> + (1UL << (ilog2((n) - 1) + 1)) \
> + ) : \
> + __roundup_pow_of_two(n) \
> + )
> +
> +#endif /* _LINUX_LOG2_H */
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/mutex.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/mutex.h
> new file mode 100644
> index 0000000..ef5a1b4
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/mutex.h
> @@ -0,0 +1,25 @@
> +/*
> + * Copyright (c) 2006 Cisco Systems. All rights reserved.
> + *
> + * This file is released under the GPLv2.
> + */
> +
> +/* mutex compatibility for pre-2.6.16 kernels */
> +
> +#ifndef __LINUX_MUTEX_H
> +#define __LINUX_MUTEX_H
> +
> +#include <asm/semaphore.h>
> +#include <linux/lockdep.h>
> +
> +#define mutex semaphore
> +#define DEFINE_MUTEX(foo) DECLARE_MUTEX(foo)
> +#define mutex_init(foo) init_MUTEX(foo)
> +#define mutex_lock(foo) down(foo)
> +#define mutex_lock_interruptible(foo) down_interruptible(foo)
> +/* this function follows the spin_trylock() convention, so *
> + * it is negated to the down_trylock() return values! Be careful */
> +#define mutex_trylock(foo) !down_trylock(foo)
> +#define mutex_unlock(foo) up(foo)
> +
> +#endif /* __LINUX_MUTEX_H */
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/netdevice.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/netdevice.h
> new file mode 100644
> index 0000000..225eeda
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/netdevice.h
> @@ -0,0 +1,22 @@
> +#ifndef _LINUX_NETDEVICE_BACKPORT_TO_2_6_16
> +#define _LINUX_NETDEVICE_BACKPORT_TO_2_6_16
> +
> +#include_next <linux/netdevice.h>
> +
> +static inline void netif_tx_lock(struct net_device *dev)
> +{
> + spin_lock(&dev->xmit_lock);
> + dev->xmit_lock_owner = smp_processor_id();
> +}
> +
> +static inline void netif_tx_unlock(struct net_device *dev)
> +{
> + dev->xmit_lock_owner = -1;
> + spin_unlock(&dev->xmit_lock);
> +}
> +
> +#undef SET_ETHTOOL_OPS
> +#define SET_ETHTOOL_OPS(netdev, ops) \
> + (netdev)->ethtool_ops = (struct ethtool_ops *)(ops)
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/random.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/random.h
> new file mode 100644
> index 0000000..2ea2e1f
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/random.h
> @@ -0,0 +1,15 @@
> +#ifndef BACKPORT_LINUX_RANDOM_TO_2_6_18
> +#define BACKPORT_LINUX_RANDOM_TO_2_6_18
> +#include_next <linux/random.h>
> +
> +static inline u32 backport_random32(void)
> +{
> + u32 v;
> +
> + get_random_bytes(&v, sizeof(u32));
> + return v;
> +}
> +
> +#define random32 backport_random32
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/rwsem.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/rwsem.h
> new file mode 100644
> index 0000000..1ad4e13
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/rwsem.h
> @@ -0,0 +1,8 @@
> +#ifndef _LINUX_RWSEM_BACKPORT_TO_2_6_17
> +#define _LINUX_RWSEM_BACKPORT_TO_2_6_17
> +
> +#include_next <linux/rwsem.h>
> +
> +#define down_read_nested(sem, subclass) down_read(sem)
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/signal.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/signal.h
> new file mode 100644
> index 0000000..78adbab
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/signal.h
> @@ -0,0 +1,8 @@
> +#ifndef _LINUX_SIGNAL_BACKPORT_2_6_17
> +#define _LINUX_SIGNAL_BACKPORT_2_6_17
> +
> +#include_next <linux/signal.h>
> +
> +#define IRQF_SHARED SA_SHIRQ
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/skbuff.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/skbuff.h
> new file mode 100644
> index 0000000..70bf011
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/skbuff.h
> @@ -0,0 +1,11 @@
> +#ifndef LINUX_SKBUFF_H_BACKPORT
> +#define LINUX_SKBUFF_H_BACKPORT
> +
> +#include_next <linux/skbuff.h>
> +
> +#define CHECKSUM_PARTIAL CHECKSUM_HW
> +#define CHECKSUM_COMPLETE CHECKSUM_HW
> +
> +#define gso_size tso_size
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/slab.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/slab.h
> new file mode 100644
> index 0000000..46ac6e5
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/slab.h
> @@ -0,0 +1,34 @@
> +#include_next <linux/slab.h>
> +
> +#include_next <linux/slab.h>
> +
> +#ifndef BACKPORT_LINUX_STRING_TO_2_6_18
> +#define BACKPORT_LINUX_STRING_TO_2_6_18
> +
> +static inline
> +void *kmemdup(const void *src, size_t len, gfp_t gfp)
> +{
> + void *p;
> +
> + p = kmalloc(len, gfp);
> + if (p)
> + memcpy(p, src, len);
> + return p;
> +}
> +
> +#endif
> +#ifndef BACKPORT_LINUX_STRING_TO_2_6_18
> +#define BACKPORT_LINUX_STRING_TO_2_6_18
> +
> +static inline
> +void *kmemdup(const void *src, size_t len, gfp_t gfp)
> +{
> + void *p;
> +
> + p = kmalloc(len, gfp);
> + if (p)
> + memcpy(p, src, len);
> + return p;
> +}
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/spinlock.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/spinlock.h
> new file mode 100644
> index 0000000..db39389
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/spinlock.h
> @@ -0,0 +1,7 @@
> +#ifndef BACKPORT_LINUX_SPINLOCK_H
> +#define BACKPORT_LINUX_SPINLOCK_H
> +
> +#include_next <linux/spinlock.h>
> +#define spin_lock_nested(lock, subclass) spin_lock(lock)
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/types.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/types.h
> new file mode 100644
> index 0000000..86e334f
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/types.h
> @@ -0,0 +1,6 @@
> +#ifndef BACKPORT_LINUX_TYPES_TO_2_6_15
> +#define BACKPORT_LINUX_TYPES_TO_2_6_15
> +#include_next <linux/types.h>
> +
> +#define BITS_PER_BYTE 8
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/linux/workqueue.h b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/workqueue.h
> new file mode 100644
> index 0000000..cc8b2cd
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/linux/workqueue.h
> @@ -0,0 +1,50 @@
> +#ifndef BACKPORT_LINUX_WORKQUEUE_TO_2_6_19
> +#define BACKPORT_LINUX_WORKQUEUE_TO_2_6_19
> +
> +#include_next <linux/workqueue.h>
> +
> +struct delayed_work {
> + struct work_struct work;
> +};
> +
> +static inline void
> +backport_INIT_WORK(struct work_struct *work, void *func)
> +{
> + INIT_WORK(work, func, work);
> +}
> +
> +static inline int backport_queue_delayed_work(struct workqueue_struct *wq,
> + struct delayed_work *work,
> + unsigned long delay)
> +{
> + return queue_delayed_work(wq, &work->work, delay);
> +}
> +
> +static inline int
> +backport_cancel_delayed_work(struct delayed_work *work)
> +{
> + return cancel_delayed_work(&work->work);
> +}
> +
> +static inline void
> +backport_cancel_rearming_delayed_workqueue(struct workqueue_struct *wq, struct delayed_work *work)
> +{
> + cancel_rearming_delayed_workqueue(wq, &work->work);
> +}
> +
> +
> +#undef INIT_WORK
> +#define INIT_WORK(_work, _func) backport_INIT_WORK(_work, _func)
> +#define INIT_DELAYED_WORK(_work, _func) INIT_WORK(&(_work)->work, _func)
> +
> +#undef DECLARE_WORK
> +#define DECLARE_WORK(n, f) \
> + struct work_struct n = __WORK_INITIALIZER(n, (void (*)(void *))f, &(n))
> +#define DECLARE_DELAYED_WORK(n, f) \
> + struct delayed_work n = { .work = __WORK_INITIALIZER(n.work, f, &(n.work)) }
> +
> +#define queue_delayed_work backport_queue_delayed_work
> +#define cancel_delayed_work backport_cancel_delayed_work
> +#define cancel_rearming_delayed_workqueue backport_cancel_rearming_delayed_workqueue
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/net/inet_sock.h b/kernel_addons/backport/2.6.15_ubuntu606/include/net/inet_sock.h
> new file mode 100644
> index 0000000..962da47
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/net/inet_sock.h
> @@ -0,0 +1,6 @@
> +#ifndef NET_INET_SOCK_H
> +#define NET_INET_SOCK_H
> +
> +#include <linux/ip.h>
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/net/netevent.h b/kernel_addons/backport/2.6.15_ubuntu606/include/net/netevent.h
> new file mode 100644
> index 0000000..e5d2162
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/net/netevent.h
> @@ -0,0 +1,33 @@
> +#ifndef _NET_EVENT_H
> +#define _NET_EVENT_H
> +
> +/*
> + * Generic netevent notifiers
> + *
> + * Authors:
> + * Tom Tucker <tom at opengridcomputing.com>
> + * Steve Wise <swise at opengridcomputing.com>
> + *
> + * Changes:
> + */
> +#ifdef __KERNEL__
> +
> +#include <net/dst.h>
> +
> +struct netevent_redirect {
> + struct dst_entry *old;
> + struct dst_entry *new;
> +};
> +
> +enum netevent_notif_type {
> + NETEVENT_NEIGH_UPDATE = 1, /* arg is struct neighbour ptr */
> + NETEVENT_PMTU_UPDATE, /* arg is struct dst_entry ptr */
> + NETEVENT_REDIRECT, /* arg is struct netevent_redirect ptr */
> +};
> +
> +extern int register_netevent_notifier(struct notifier_block *nb);
> +extern int unregister_netevent_notifier(struct notifier_block *nb);
> +extern int call_netevent_notifiers(unsigned long val, void *v);
> +
> +#endif
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/net/sock.h b/kernel_addons/backport/2.6.15_ubuntu606/include/net/sock.h
> new file mode 100644
> index 0000000..f621a71
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/net/sock.h
> @@ -0,0 +1,8 @@
> +#ifndef _NET_SOCK_SLES_BACKPORT_H
> +#define _NET_SOCK_SLES_BACKPORT_H
> +
> +#include_next <net/sock.h>
> +
> +#define sk_eat_skb(a, b, c) sk_eat_skb(a, b)
> +
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/scsi/scsi.h b/kernel_addons/backport/2.6.15_ubuntu606/include/scsi/scsi.h
> new file mode 100644
> index 0000000..352330d
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/scsi/scsi.h
> @@ -0,0 +1,7 @@
> +#ifndef _SCSI_SCSI_H_BACKPORT
> +#define _SCSI_SCSI_H_BACKPORT
> +
> +#include_next <scsi/scsi.h>
> +
> +#define SCAN_WILD_CARD ~0
> +#endif
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/src/genalloc.c b/kernel_addons/backport/2.6.15_ubuntu606/include/src/genalloc.c
> new file mode 100644
> index 0000000..75ae68c
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/src/genalloc.c
> @@ -0,0 +1,198 @@
> +/*
> + * Basic general purpose allocator for managing special purpose memory
> + * not managed by the regular kmalloc/kfree interface.
> + * Uses for this includes on-device special memory, uncached memory
> + * etc.
> + *
> + * Copyright 2005 (C) Jes Sorensen <jes at trained-monkey.org>
> + *
> + * This source code is licensed under the GNU General Public License,
> + * Version 2. See the file COPYING for more details.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/genalloc.h>
> +
> +
> +/**
> + * gen_pool_create - create a new special memory pool
> + * @min_alloc_order: log base 2 of number of bytes each bitmap bit represents
> + * @nid: node id of the node the pool structure should be allocated on, or -1
> + *
> + * Create a new special memory pool that can be used to manage special purpose
> + * memory not managed by the regular kmalloc/kfree interface.
> + */
> +struct gen_pool *gen_pool_create(int min_alloc_order, int nid)
> +{
> + struct gen_pool *pool;
> +
> + pool = kmalloc_node(sizeof(struct gen_pool), GFP_KERNEL, nid);
> + if (pool != NULL) {
> + rwlock_init(&pool->lock);
> + INIT_LIST_HEAD(&pool->chunks);
> + pool->min_alloc_order = min_alloc_order;
> + }
> + return pool;
> +}
> +EXPORT_SYMBOL(gen_pool_create);
> +
> +/**
> + * gen_pool_add - add a new chunk of special memory to the pool
> + * @pool: pool to add new memory chunk to
> + * @addr: starting address of memory chunk to add to pool
> + * @size: size in bytes of the memory chunk to add to pool
> + * @nid: node id of the node the chunk structure and bitmap should be
> + * allocated on, or -1
> + *
> + * Add a new chunk of special memory to the specified pool.
> + */
> +int gen_pool_add(struct gen_pool *pool, unsigned long addr, size_t size,
> + int nid)
> +{
> + struct gen_pool_chunk *chunk;
> + int nbits = size >> pool->min_alloc_order;
> + int nbytes = sizeof(struct gen_pool_chunk) +
> + (nbits + BITS_PER_BYTE - 1) / BITS_PER_BYTE;
> +
> + chunk = kmalloc_node(nbytes, GFP_KERNEL, nid);
> + if (unlikely(chunk == NULL))
> + return -1;
> +
> + memset(chunk, 0, nbytes);
> + spin_lock_init(&chunk->lock);
> + chunk->start_addr = addr;
> + chunk->end_addr = addr + size;
> +
> + write_lock(&pool->lock);
> + list_add(&chunk->next_chunk, &pool->chunks);
> + write_unlock(&pool->lock);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(gen_pool_add);
> +
> +/**
> + * gen_pool_destroy - destroy a special memory pool
> + * @pool: pool to destroy
> + *
> + * Destroy the specified special memory pool. Verifies that there are no
> + * outstanding allocations.
> + */
> +void gen_pool_destroy(struct gen_pool *pool)
> +{
> + struct list_head *_chunk, *_next_chunk;
> + struct gen_pool_chunk *chunk;
> + int order = pool->min_alloc_order;
> + int bit, end_bit;
> +
> +
> + write_lock(&pool->lock);
> + list_for_each_safe(_chunk, _next_chunk, &pool->chunks) {
> + chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
> + list_del(&chunk->next_chunk);
> +
> + end_bit = (chunk->end_addr - chunk->start_addr) >> order;
> + bit = find_next_bit(chunk->bits, end_bit, 0);
> + BUG_ON(bit < end_bit);
> +
> + kfree(chunk);
> + }
> + kfree(pool);
> + return;
> +}
> +EXPORT_SYMBOL(gen_pool_destroy);
> +
> +/**
> + * gen_pool_alloc - allocate special memory from the pool
> + * @pool: pool to allocate from
> + * @size: number of bytes to allocate from the pool
> + *
> + * Allocate the requested number of bytes from the specified pool.
> + * Uses a first-fit algorithm.
> + */
> +unsigned long gen_pool_alloc(struct gen_pool *pool, size_t size)
> +{
> + struct list_head *_chunk;
> + struct gen_pool_chunk *chunk;
> + unsigned long addr, flags;
> + int order = pool->min_alloc_order;
> + int nbits, bit, start_bit, end_bit;
> +
> + if (size == 0)
> + return 0;
> +
> + nbits = (size + (1UL << order) - 1) >> order;
> +
> + read_lock(&pool->lock);
> + list_for_each(_chunk, &pool->chunks) {
> + chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
> +
> + end_bit = (chunk->end_addr - chunk->start_addr) >> order;
> + end_bit -= nbits + 1;
> +
> + spin_lock_irqsave(&chunk->lock, flags);
> + bit = -1;
> + while (bit + 1 < end_bit) {
> + bit = find_next_zero_bit(chunk->bits, end_bit, bit + 1);
> + if (bit >= end_bit)
> + break;
> +
> + start_bit = bit;
> + if (nbits > 1) {
> + bit = find_next_bit(chunk->bits, bit + nbits,
> + bit + 1);
> + if (bit - start_bit < nbits)
> + continue;
> + }
> +
> + addr = chunk->start_addr +
> + ((unsigned long)start_bit << order);
> + while (nbits--)
> + __set_bit(start_bit++, &chunk->bits);
> + spin_unlock_irqrestore(&chunk->lock, flags);
> + read_unlock(&pool->lock);
> + return addr;
> + }
> + spin_unlock_irqrestore(&chunk->lock, flags);
> + }
> + read_unlock(&pool->lock);
> + return 0;
> +}
> +EXPORT_SYMBOL(gen_pool_alloc);
> +
> +/**
> + * gen_pool_free - free allocated special memory back to the pool
> + * @pool: pool to free to
> + * @addr: starting address of memory to free back to pool
> + * @size: size in bytes of memory to free
> + *
> + * Free previously allocated special memory back to the specified pool.
> + */
> +void gen_pool_free(struct gen_pool *pool, unsigned long addr, size_t size)
> +{
> + struct list_head *_chunk;
> + struct gen_pool_chunk *chunk;
> + unsigned long flags;
> + int order = pool->min_alloc_order;
> + int bit, nbits;
> +
> + nbits = (size + (1UL << order) - 1) >> order;
> +
> + read_lock(&pool->lock);
> + list_for_each(_chunk, &pool->chunks) {
> + chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
> +
> + if (addr >= chunk->start_addr && addr < chunk->end_addr) {
> + BUG_ON(addr + size > chunk->end_addr);
> + spin_lock_irqsave(&chunk->lock, flags);
> + bit = (addr - chunk->start_addr) >> order;
> + while (nbits--)
> + __clear_bit(bit++, &chunk->bits);
> + spin_unlock_irqrestore(&chunk->lock, flags);
> + break;
> + }
> + }
> + BUG_ON(nbits > 0);
> + read_unlock(&pool->lock);
> +}
> +EXPORT_SYMBOL(gen_pool_free);
> diff --git a/kernel_addons/backport/2.6.15_ubuntu606/include/src/netevent.c b/kernel_addons/backport/2.6.15_ubuntu606/include/src/netevent.c
> new file mode 100644
> index 0000000..5ffadd1
> --- /dev/null
> +++ b/kernel_addons/backport/2.6.15_ubuntu606/include/src/netevent.c
> @@ -0,0 +1,71 @@
> +/*
> + * Network event notifiers
> + *
> + * Authors:
> + * Tom Tucker <tom at opengridcomputing.com>
> + * Steve Wise <swise at opengridcomputing.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version
> + * 2 of the License, or (at your option) any later version.
> + *
> + * Fixes:
> + */
> +
> +#include <linux/module.h>
> +#include <linux/skbuff.h>
> +#include <linux/rtnetlink.h>
> +#include <linux/notifier.h>
> +
> +static struct notifier_block *netevent_notif_chain;
> +
> +/**
> + * register_netevent_notifier - register a netevent notifier block
> + * @nb: notifier
> + *
> + * Register a notifier to be called when a netevent occurs.
> + * The notifier passed is linked into the kernel structures and must
> + * not be reused until it has been unregistered. A negative errno code
> + * is returned on a failure.
> + */
> +int register_netevent_notifier(struct notifier_block *nb)
> +{
> + int err;
> +
> + err = notifier_chain_register(&netevent_notif_chain, nb);
> + return err;
> +}
> +
> +/**
> + * netevent_unregister_notifier - unregister a netevent notifier block
> + * @nb: notifier
> + *
> + * Unregister a notifier previously registered by
> + * register_neigh_notifier(). The notifier is unlinked into the
> + * kernel structures and may then be reused. A negative errno code
> + * is returned on a failure.
> + */
> +
> +int unregister_netevent_notifier(struct notifier_block *nb)
> +{
> + return notifier_chain_unregister(&netevent_notif_chain, nb);
> +}
> +
> +/**
> + * call_netevent_notifiers - call all netevent notifier blocks
> + * @val: value passed unmodified to notifier function
> + * @v: pointer passed unmodified to notifier function
> + *
> + * Call all neighbour notifier blocks. Parameters and return value
> + * are as for notifier_call_chain().
> + */
> +
> +int call_netevent_notifiers(unsigned long val, void *v)
> +{
> + return notifier_call_chain(&netevent_notif_chain, val, v);
> +}
> +
> +EXPORT_SYMBOL_GPL(register_netevent_notifier);
> +EXPORT_SYMBOL_GPL(unregister_netevent_notifier);
> +EXPORT_SYMBOL_GPL(call_netevent_notifiers);
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/1_struct_path_revert_to_2_6_19.patch b/kernel_patches/backport/2.6.15_ubuntu606/1_struct_path_revert_to_2_6_19.patch
> new file mode 100644
> index 0000000..27eb62e
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/1_struct_path_revert_to_2_6_19.patch
> @@ -0,0 +1,82 @@
> +diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
> +index a617ca7..4e16314 100644
> +--- a/drivers/infiniband/core/uverbs_main.c
> ++++ b/drivers/infiniband/core/uverbs_main.c
> +@@ -534,9 +534,9 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
> + * module reference.
> + */
> + filp->f_op = fops_get(&uverbs_event_fops);
> +- filp->f_path.mnt = mntget(uverbs_event_mnt);
> +- filp->f_path.dentry = dget(uverbs_event_mnt->mnt_root);
> +- filp->f_mapping = filp->f_path.dentry->d_inode->i_mapping;
> ++ filp->f_vfsmnt = mntget(uverbs_event_mnt);
> ++ filp->f_dentry = dget(uverbs_event_mnt->mnt_root);
> ++ filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
> + filp->f_flags = O_RDONLY;
> + filp->f_mode = FMODE_READ;
> + filp->private_data = ev_file;
> +diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
> +index b932bcb..ddbcabd 100644
> +--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
> ++++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
> +@@ -1744,9 +1744,9 @@ static int ipath_assign_port(struct file *fp,
> + goto done;
> + }
> +
> +- i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE;
> ++ i_minor = iminor(fp->f_dentry->d_inode) - IPATH_USER_MINOR_BASE;
> + ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
> +- (long)fp->f_path.dentry->d_inode->i_rdev, i_minor);
> ++ (long)fp->f_dentry->d_inode->i_rdev, i_minor);
> +
> + if (i_minor)
> + ret = find_free_port(i_minor - 1, fp, uinfo);
> +diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
> +index 79a60f0..d9ff283 100644
> +--- a/drivers/infiniband/hw/ipath/ipath_fs.c
> ++++ b/drivers/infiniband/hw/ipath/ipath_fs.c
> +@@ -118,7 +118,7 @@ static ssize_t atomic_counters_read(struct file *file, char __user *buf,
> + u16 i;
> + struct ipath_devdata *dd;
> +
> +- dd = file->f_path.dentry->d_inode->i_private;
> ++ dd = file->f_dentry->d_inode->i_private;
> +
> + for (i = 0; i < NUM_COUNTERS; i++)
> + counters[i] = ipath_snap_cntr(dd, i);
> +@@ -138,7 +138,7 @@ static ssize_t atomic_node_info_read(struct file *file, char __user *buf,
> + struct ipath_devdata *dd;
> + u64 guid;
> +
> +- dd = file->f_path.dentry->d_inode->i_private;
> ++ dd = file->f_dentry->d_inode->i_private;
> +
> + guid = be64_to_cpu(dd->ipath_guid);
> +
> +@@ -177,7 +177,7 @@ static ssize_t atomic_port_info_read(struct file *file, char __user *buf,
> + u32 tmp, tmp2;
> + struct ipath_devdata *dd;
> +
> +- dd = file->f_path.dentry->d_inode->i_private;
> ++ dd = file->f_dentry->d_inode->i_private;
> +
> + /* so we only initialize non-zero fields. */
> + memset(portinfo, 0, sizeof portinfo);
> +@@ -324,7 +324,7 @@ static ssize_t flash_read(struct file *file, char __user *buf,
> + goto bail;
> + }
> +
> +- dd = file->f_path.dentry->d_inode->i_private;
> ++ dd = file->f_dentry->d_inode->i_private;
> + if (ipath_eeprom_read(dd, pos, tmp, count)) {
> + ipath_dev_err(dd, "failed to read from flash\n");
> + ret = -ENXIO;
> +@@ -377,7 +377,7 @@ static ssize_t flash_write(struct file *file, const char __user *buf,
> + goto bail_tmp;
> + }
> +
> +- dd = file->f_path.dentry->d_inode->i_private;
> ++ dd = file->f_dentry->d_inode->i_private;
> + if (ipath_eeprom_write(dd, pos, tmp, count)) {
> + ret = -ENXIO;
> + ipath_dev_err(dd, "failed to write to flash\n");
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/2_misc_device_to_2_6_19.patch b/kernel_patches/backport/2.6.15_ubuntu606/2_misc_device_to_2_6_19.patch
> new file mode 100644
> index 0000000..6601371
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/2_misc_device_to_2_6_19.patch
> @@ -0,0 +1,33 @@
> +diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
> +index 81a5cdc..640508d 100644
> +--- a/drivers/infiniband/core/ucma.c
> ++++ b/drivers/infiniband/core/ucma.c
> +@@ -842,7 +842,7 @@ static ssize_t show_abi_version(struct device *dev,
> + {
> + return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
> + }
> +-static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
> ++static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
> +
> + static int __init ucma_init(void)
> + {
> +@@ -852,7 +852,8 @@ static int __init ucma_init(void)
> + if (ret)
> + return ret;
> +
> +- ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
> ++ ret = class_device_create_file(ucma_misc.class,
> ++ &class_device_attr_abi_version);
> + if (ret) {
> + printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n");
> + goto err;
> +@@ -865,7 +866,8 @@ err:
> +
> + static void __exit ucma_cleanup(void)
> + {
> +- device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
> ++ class_device_remove_file(ucma_misc.class,
> ++ &class_device_attr_abi_version);
> + misc_deregister(&ucma_misc);
> + idr_destroy(&ctx_idr);
> + }
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/addr_1_netevents_revert_to_2_6_17.patch b/kernel_patches/backport/2.6.15_ubuntu606/addr_1_netevents_revert_to_2_6_17.patch
> new file mode 100644
> index 0000000..316d8d2
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/addr_1_netevents_revert_to_2_6_17.patch
> @@ -0,0 +1,76 @@
> +commit e795d092507d571d66f2ec98d3efdc7dd284bf80
> +Author: Tom Tucker <tom at opengridcomputing.com>
> +Date: Sun Jul 30 20:44:19 2006 -0700
> +
> + [NET] infiniband: Cleanup ib_addr module to use the netevents
> +
> + Signed-off-by: Tom Tucker <tom at opengridcomputing.com>
> + Signed-off-by: Steve Wise <swise at opengridcomputing.com>
> + Signed-off-by: David S. Miller <davem at davemloft.net>
> +
> +diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
> +index 1205e80..d294bbc 100644
> +--- a/drivers/infiniband/core/addr.c
> ++++ b/drivers/infiniband/core/addr.c
> +@@ -35,7 +35,6 @@ #include <linux/if_arp.h>
> + #include <net/arp.h>
> + #include <net/neighbour.h>
> + #include <net/route.h>
> +-#include <net/netevent.h>
> + #include <rdma/ib_addr.h>
> +
> + MODULE_AUTHOR("Sean Hefty");
> +@@ -327,22 +326,25 @@ void rdma_addr_cancel(struct rdma_dev_ad
> + }
> + EXPORT_SYMBOL(rdma_addr_cancel);
> +
> +-static int netevent_callback(struct notifier_block *self, unsigned long event,
> +- void *ctx)
> ++static int addr_arp_recv(struct sk_buff *skb, struct net_device *dev,
> ++ struct packet_type *pkt, struct net_device *orig_dev)
> + {
> +- if (event == NETEVENT_NEIGH_UPDATE) {
> +- struct neighbour *neigh = ctx;
> ++ struct arphdr *arp_hdr;
> +
> +- if (neigh->dev->type == ARPHRD_INFINIBAND &&
> +- (neigh->nud_state & NUD_VALID)) {
> +- set_timeout(jiffies);
> +- }
> +- }
> ++ arp_hdr = (struct arphdr *) skb->nh.raw;
> ++
> ++ if (arp_hdr->ar_op == htons(ARPOP_REQUEST) ||
> ++ arp_hdr->ar_op == htons(ARPOP_REPLY))
> ++ set_timeout(jiffies);
> ++
> ++ kfree_skb(skb);
> + return 0;
> + }
> +
> +-static struct notifier_block nb = {
> +- .notifier_call = netevent_callback
> ++static struct packet_type addr_arp = {
> ++ .type = __constant_htons(ETH_P_ARP),
> ++ .func = addr_arp_recv,
> ++ .af_packet_priv = (void*) 1,
> + };
> +
> + static int addr_init(void)
> +@@ -351,13 +353,13 @@ static int addr_init(void)
> + if (!addr_wq)
> + return -ENOMEM;
> +
> +- register_netevent_notifier(&nb);
> ++ dev_add_pack(&addr_arp);
> + return 0;
> + }
> +
> + static void addr_cleanup(void)
> + {
> +- unregister_netevent_notifier(&nb);
> ++ dev_remove_pack(&addr_arp);
> + destroy_workqueue(addr_wq);
> + }
> +
> +
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/cxgb3_makefile_to_2_6_19.patch b/kernel_patches/backport/2.6.15_ubuntu606/cxgb3_makefile_to_2_6_19.patch
> new file mode 100644
> index 0000000..ad7e7f4
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/cxgb3_makefile_to_2_6_19.patch
> @@ -0,0 +1,12 @@
> +diff --git a/drivers/net/cxgb3/Makefile b/drivers/net/cxgb3/Makefile
> +index 3434679..bb008b6 100755
> +--- a/drivers/net/cxgb3/Makefile
> ++++ b/drivers/net/cxgb3/Makefile
> +@@ -1,6 +1,7 @@
> + #
> + # Chelsio T3 driver
> + #
> ++NOSTDINC_FLAGS:= $(NOSTDINC_FLAGS) $(LINUXINCLUDE)
> +
> + obj-$(CONFIG_CHELSIO_T3) += cxgb3.o
> +
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/ipoib_8111_to_2_6_16.patch b/kernel_patches/backport/2.6.15_ubuntu606/ipoib_8111_to_2_6_16.patch
> new file mode 100644
> index 0000000..2975774
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/ipoib_8111_to_2_6_16.patch
> @@ -0,0 +1,83 @@
> +diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
> +index 07deee8..501ee93 100644
> +--- a/drivers/infiniband/ulp/ipoib/ipoib.h
> ++++ b/drivers/infiniband/ulp/ipoib/ipoib.h
> +@@ -217,6 +219,7 @@ struct ipoib_neigh {
> +
> + struct neighbour *neighbour;
> +
> ++ struct list_head all_neigh_list;
> + struct list_head list;
> + };
> +
> +diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
> +index 705eb1d..56022f5 100644
> +--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
> ++++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
> +@@ -85,6 +85,9 @@ struct workqueue_struct *ipoib_workqueue;
> +
> + struct ib_sa_client ipoib_sa_client;
> +
> ++static DEFINE_SPINLOCK(ipoib_all_neigh_list_lock);
> ++static LIST_HEAD(ipoib_all_neigh_list);
> ++
> + static void ipoib_add_one(struct ib_device *device);
> + static void ipoib_remove_one(struct ib_device *device);
> +
> +@@ -773,6 +776,17 @@ static void ipoib_neigh_destructor(struct neighbour *n)
> + unsigned long flags;
> + struct ipoib_ah *ah = NULL;
> +
> ++ struct ipoib_neigh *tn, *nn = NULL;
> ++ spin_lock(&ipoib_all_neigh_list_lock);
> ++ list_for_each_entry(tn, &ipoib_all_neigh_list, all_neigh_list)
> ++ if (tn->neighbour == n) {
> ++ nn = tn;
> ++ break;
> ++ }
> ++ spin_unlock(&ipoib_all_neigh_list_lock);
> ++ if (!nn)
> ++ return;
> ++
> + ipoib_dbg(priv,
> + "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
> + IPOIB_QPN(n->ha),
> +@@ -806,6 +820,11 @@ struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour)
> + *to_ipoib_neigh(neighbour) = neigh;
> + skb_queue_head_init(&neigh->queue);
> +
> ++ spin_lock(&ipoib_all_neigh_list_lock);
> ++ list_add_tail(&neigh->all_neigh_list, &ipoib_all_neigh_list);
> ++ neigh->neighbour->ops->destructor = ipoib_neigh_destructor;
> ++ spin_unlock(&ipoib_all_neigh_list_lock);
> ++
> + return neigh;
> + }
> +
> +@@ -813,6 +832,17 @@ void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
> + {
> + struct ipoib_dev_priv *priv = netdev_priv(dev);
> + struct sk_buff *skb;
> ++ struct ipoib_neigh *nn;
> ++ spin_lock(&ipoib_all_neigh_list_lock);
> ++ list_del(&neigh->all_neigh_list);
> ++ list_for_each_entry(nn, &ipoib_all_neigh_list, all_neigh_list)
> ++ if (nn->neighbour->ops == neigh->neighbour->ops)
> ++ goto found;
> ++
> ++ neigh->neighbour->ops->destructor = NULL;
> ++found:
> ++ spin_unlock(&ipoib_all_neigh_list_lock);
> ++
> + *to_ipoib_neigh(neigh->neighbour) = NULL;
> + while ((skb = __skb_dequeue(&neigh->queue))) {
> + ++priv->stats.tx_dropped;
> +@@ -823,8 +853,6 @@ void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
> +
> + static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
> + {
> +- parms->neigh_destructor = ipoib_neigh_destructor;
> +-
> + return 0;
> + }
> +
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/linux_stuff_to_2_6_17.patch b/kernel_patches/backport/2.6.15_ubuntu606/linux_stuff_to_2_6_17.patch
> new file mode 100644
> index 0000000..eb2285f
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/linux_stuff_to_2_6_17.patch
> @@ -0,0 +1,24 @@
> +diff --git a/drivers/infiniband/core/genalloc.c b/drivers/infiniband/core/genalloc.c
> +new file mode 100644
> +index 0000000..58cf933
> +--- /dev/null
> ++++ b/drivers/infiniband/core/genalloc.c
> +@@ -0,0 +1 @@
> ++#include "src/genalloc.c"
> +diff --git a/drivers/infiniband/core/netevent.c b/drivers/infiniband/core/netevent.c
> +new file mode 100644
> +index 0000000..58cf933
> +--- /dev/null
> ++++ b/drivers/infiniband/core/netevent.c
> +@@ -0,0 +1 @@
> ++#include "src/netevent.c"
> +diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile
> +index 50fb1cd..456bfd0 100644
> +--- a/drivers/infiniband/core/Makefile
> ++++ b/drivers/infiniband/core/Makefile
> +@@ -30,3 +30,5 @@ ib_ucm-y := ucm.o
> +
> + ib_uverbs-y := uverbs_main.o uverbs_cmd.o uverbs_mem.o \
> + uverbs_marshall.o
> ++
> ++ib_core-y += genalloc.o netevent.o
> diff --git a/kernel_patches/backport/2.6.15_ubuntu606/uverbs_to_2_6_17.patch b/kernel_patches/backport/2.6.15_ubuntu606/uverbs_to_2_6_17.patch
> new file mode 100644
> index 0000000..497a203
> --- /dev/null
> +++ b/kernel_patches/backport/2.6.15_ubuntu606/uverbs_to_2_6_17.patch
> @@ -0,0 +1,20 @@
> +Index: gen2_linux/drivers/infiniband/core/uverbs_main.c
> +===================================================================
> +--- gen2_linux.orig/drivers/infiniband/core/uverbs_main.c
> ++++ gen2_linux/drivers/infiniband/core/uverbs_main.c
> +@@ -815,12 +815,11 @@ static void ib_uverbs_remove_one(struct
> + kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
> + }
> +
> +-static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
> +- const char *dev_name, void *data,
> +- struct vfsmount *mnt)
> ++static struct super_block *uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
> ++ const char *dev_name, void *data)
> + {
> + return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
> +- INFINIBANDEVENTFS_MAGIC, mnt);
> ++ INFINIBANDEVENTFS_MAGIC);
> + }
> +
> + static struct file_system_type uverbs_event_fs = {
> diff --git a/ofed_scripts/configure b/ofed_scripts/configure
> index f5e1da4..0618d77 100755
> --- a/ofed_scripts/configure
> +++ b/ofed_scripts/configure
> @@ -195,6 +195,9 @@ get_backport_dir()
> 2.6.14*)
> echo 2.6.14
> ;;
> + 2.6.15-*-*)
> + echo 2.6.15_ubuntu606
> + ;;
> 2.6.15*)
> echo 2.6.15
> ;;
>
>
>
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