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Commit 8df09ea3 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

[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: default avatarEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ce55dd36

include/net/sock.h

+3 −3
Original line number Diff line number Diff line
@@ -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)