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authorChristoph Lameter <cl@linux.com>2011-05-05 15:23:54 -0500
committerPekka Enberg <penberg@kernel.org>2011-05-07 20:25:38 +0300
commit1759415e630e5db0dd2390df9f94892cbfb9a8a2 (patch)
treebfae4443c70ee88c54aa9743ca19ed122af45f8f /include/linux/slub_def.h
parent8dc16c6c04b1a82d00a8464ccc08e1fe17d0ff82 (diff)
slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery
Remove the #ifdefs. This means that the irqsafe_cpu_cmpxchg_double() is used everywhere. There may be performance implications since: A. We now have to manage a transaction ID for all arches B. The interrupt holdoff for arches not supporting CONFIG_CMPXCHG_LOCAL is reduced to a very short irqoff section. There are no multiple irqoff/irqon sequences as a result of this change. Even in the fallback case we only have to do one disable and enable like before. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slub_def.h')
-rw-r--r--include/linux/slub_def.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 45ca123e8002..ca0c076b2374 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -37,9 +37,7 @@ enum stat_item {
struct kmem_cache_cpu {
void **freelist; /* Pointer to next available object */
-#ifdef CONFIG_CMPXCHG_LOCAL
unsigned long tid; /* Globally unique transaction id */
-#endif
struct page *page; /* The slab from which we are allocating */
int node; /* The node of the page (or -1 for debug) */
#ifdef CONFIG_SLUB_STATS