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[SOCK] Avoid integer divides where not necessary in include/net/sock.h 

Because sk_wmem_queued, sk_sndbuf are signed, a divide per two
may force compiler to use an integer divide.

We can instead use a right shift.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2007-12-21 03:07:41 -08:00 committed by David S. Miller
parent ce55dd3610
commit 8df09ea3b8
1 changed files with 3 additions and 3 deletions
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6
include/net/sock.h
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@ -445,7 +445,7 @@ static inline int sk_acceptq_is_full(struct sock *sk)
*/
static inline int sk_stream_min_wspace(struct sock *sk)
{
return sk->sk_wmem_queued / 2;
return sk->sk_wmem_queued >> 1;
}
static inline int sk_stream_wspace(struct sock *sk)
@ -1187,7 +1187,7 @@ static inline void sk_wake_async(struct sock *sk, int how, int band)
static inline void sk_stream_moderate_sndbuf(struct sock *sk)
{
if (!(sk->sk_userlocks & SOCK_SNDBUF_LOCK)) {
sk->sk_sndbuf = min(sk->sk_sndbuf, sk->sk_wmem_queued / 2);
sk->sk_sndbuf = min(sk->sk_sndbuf, sk->sk_wmem_queued >> 1);
sk->sk_sndbuf = max(sk->sk_sndbuf, SOCK_MIN_SNDBUF);
}
}
@ -1211,7 +1211,7 @@ static inline struct page *sk_stream_alloc_page(struct sock *sk)
*/
static inline int sock_writeable(const struct sock *sk)
{
return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf / 2);
return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
}
static inline gfp_t gfp_any(void)