[PATCH 19/39] mm: add unlikely to the mm allocation failure check

[Andrea Arcangeli]

Very minor optimization to hint gcc.

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

diff --git a/kernel/fork.c b/kernel/fork.c
index aefe24f..31b2f35 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -547,7 +547,7 @@ 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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