[ofa-general] [PATCH] ib/fmr_pool: allocage page list only when caching enabled

[Or Gerlitz]

Allocate memory for the page_list field of struct ib_pool_fmr only when
caching is enabled, since it is not used otherwise

Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>

Index: linux-2.6.24-rc8/drivers/infiniband/core/fmr_pool.c
===================================================================
--- linux-2.6.24-rc8.orig/drivers/infiniband/core/fmr_pool.c	2008-01-28 16:45:41.000000000 +0200
+++ linux-2.6.24-rc8/drivers/infiniband/core/fmr_pool.c	2008-01-29 09:17:56.000000000 +0200
@@ -308,10 +308,13 @@ struct ib_fmr_pool *ib_create_fmr_pool(s
 			.max_maps   = pool->max_remaps,
 			.page_shift = params->page_shift
 		};
+		int bytes_per_fmr = sizeof *fmr;
+
+		if (pool->cache_bucket)
+			bytes_per_fmr += params->max_pages_per_fmr * sizeof (u64);

 		for (i = 0; i < params->pool_size; ++i) {
-			fmr = kmalloc(sizeof *fmr + params->max_pages_per_fmr * sizeof (u64),
-				      GFP_KERNEL);
+			fmr = kmalloc(bytes_per_fmr, GFP_KERNEL);
 			if (!fmr) {
 				printk(KERN_WARNING PFX "failed to allocate fmr "
 				       "struct for FMR %d\n", i);