[PATCH net-next] fib: use __fls() on non null argument
From: Eric Dumazet <hidden>
Date: 2012-08-07 13:30:58
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
From: Eric Dumazet <edumazet@google.com> __fls(x) is a bit faster than fls(x), granted we know x is non null. Signed-off-by: Eric Dumazet <edumazet@google.com> --- net/ipv4/fib_trie.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index f0cdb30..0bb20c4 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c@@ -1550,7 +1550,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, * state.directly. */ if (pref_mismatch) { - int mp = KEYLENGTH - fls(pref_mismatch); + int mp = KEYLENGTH - __fls(pref_mismatch); if (tkey_extract_bits(cn->key, mp, cn->pos - mp) != 0) goto backtrace;