[PATCH 01/35] mm: add unlikely to the mm allocation failure check

Andrea Arcangeli
2012-05-25T17:06:53Z

Very minor optimization to hint gcc.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
kernel/fork.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 47b4e4f..98db8b0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -571,7 +571,7 @@ struct mm_struct *mm_alloc(void)
struct mm_struct *mm;

mm = allocate_mm();
- if (!mm)
+ if (unlikely(!mm))
return NULL;

memset(mm, 0, sizeof(*mm));