From: Ingo Molnar Date: Mon, 9 Jul 2007 16:52:01 +0000 (+0200) Subject: sched: micro-optimize mmdrop() X-Git-Tag: v2.6.23-rc1~1229 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=6fb43d7b50e49a36f8be3199141bec473e5ecb00;p=linux-2.6-omap-h63xx.git sched: micro-optimize mmdrop() micro-optimize mmdrop(). Improves schedule()'s assembly a bit. Signed-off-by: Ingo Molnar --- diff --git a/include/linux/sched.h b/include/linux/sched.h index 785ec8465bd..cfb680585ab 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1514,7 +1514,7 @@ extern struct mm_struct * mm_alloc(void); extern void FASTCALL(__mmdrop(struct mm_struct *)); static inline void mmdrop(struct mm_struct * mm) { - if (atomic_dec_and_test(&mm->mm_count)) + if (unlikely(atomic_dec_and_test(&mm->mm_count))) __mmdrop(mm); }