From: Eric Dumazet Date: Thu, 7 Feb 2008 09:40:19 +0000 (+0100) Subject: [TCP]: lower stack usage in cookie_hash() function X-Git-Tag: Ubuntu-5.2.0-15.16~36875^2~523 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=11baab7ac34723ad481e0f97fca733272ef364d4;p=mirror_ubuntu-eoan-kernel.git [TCP]: lower stack usage in cookie_hash() function 400 bytes allocated on stack might be a litle bit too much. Using a per_cpu var is more friendly. Signed-off-by: Eric Dumazet Signed-off-by: YOSHIFUJI Hideaki --- diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index f470fe4511db..177da14f6b14 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -35,10 +35,12 @@ module_init(init_syncookies); #define COOKIEBITS 24 /* Upper bits store count */ #define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1) +static DEFINE_PER_CPU(__u32, cookie_scratch)[16 + 5 + SHA_WORKSPACE_WORDS]; + static u32 cookie_hash(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport, u32 count, int c) { - __u32 tmp[16 + 5 + SHA_WORKSPACE_WORDS]; + __u32 *tmp = __get_cpu_var(cookie_scratch); memcpy(tmp + 3, syncookie_secret[c], sizeof(syncookie_secret[c])); tmp[0] = (__force u32)saddr;