From: Christoph Lameter <clameter@sgi.com>
Date: Tue, 17 Jul 2007 11:03:27 +0000 (-0700)
Subject: SLUB: Simplify dma index -> size calculation
X-Git-Tag: v2.6.23-rc1~741
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b55f620e6908fec2d51751320c2a9459b5f375f;p=linux-2.6

SLUB: Simplify dma index -> size calculation

There is no need to caculate the dma slab size ourselves. We can simply
lookup the size of the corresponding non dma slab.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/slub.c b/mm/slub.c
index 71988f9b9c..2ae2dae12d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2289,15 +2289,7 @@ static noinline struct kmem_cache *dma_kmalloc_cache(int index, gfp_t flags)
 	if (!x)
 		panic("Unable to allocate memory for dma cache\n");
 
-	if (index <= KMALLOC_SHIFT_HIGH)
-		realsize = 1 << index;
-	else {
-		if (index == 1)
-			realsize = 96;
-		else
-			realsize = 192;
-	}
-
+	realsize = kmalloc_caches[index].objsize;
 	text = kasprintf(flags & ~SLUB_DMA, "kmalloc_dma-%d",
 			(unsigned int)realsize);
 	s = create_kmalloc_cache(x, text, realsize, flags);