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Subject[PATCH 01/40] mm: add unlikely to the mm allocation failure check
Date
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 ab5211b..5fcfa70 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -572,7 +572,7 @@ 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));

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