From 27f39c73e63833b4c081a0d681d88b4184a0491d Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 19 May 2010 22:07:23 +0000 Subject: net: Use __this_cpu_inc() in fast path This patch saves 224 bytes of text on my machine. __this_cpu_inc() generates a single instruction, using no scratch registers : 65 ff 04 25 a8 30 01 00 incl %gs:0x130a8 instead of : 48 c7 c2 80 30 01 00 mov $0x13080,%rdx 65 48 8b 04 25 88 ea 00 00 mov %gs:0xea88,%rax 83 44 10 28 01 addl $0x1,0x28(%rax,%rdx,1) Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/route.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'net/ipv4/route.c') diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 560acc677ce4..8495bceec764 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -253,8 +253,7 @@ static unsigned rt_hash_mask __read_mostly; static unsigned int rt_hash_log __read_mostly; static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat); -#define RT_CACHE_STAT_INC(field) \ - (__raw_get_cpu_var(rt_cache_stat).field++) +#define RT_CACHE_STAT_INC(field) __this_cpu_inc(rt_cache_stat.field) static inline unsigned int rt_hash(__be32 daddr, __be32 saddr, int idx, int genid) -- cgit v1.2.3