From: Eric Dumazet <dada1@cosmosbay.com>
Date: Mon, 31 Dec 2007 23:00:50 +0000 (-0800)
Subject: [PATCH] use SK_MEM_QUANTUM_SHIFT in __sk_mem_reclaim()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=680a5a5086443b9547b32b04f40af8f9d717f711;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] use SK_MEM_QUANTUM_SHIFT in __sk_mem_reclaim()

Avoid an expensive divide (as done in commit
18030477e70a826b91608aee40a987bbd368fec6 but lost in commit
23821d2653111d20e75472c8c5003df1a55309a8)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/sock.c b/net/core/sock.c
index 8c184c4a3811..3804e7df626b 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1476,7 +1476,7 @@ void __sk_mem_reclaim(struct sock *sk)
 {
 	struct proto *prot = sk->sk_prot;
 
-	atomic_sub(sk->sk_forward_alloc / SK_MEM_QUANTUM,
+	atomic_sub(sk->sk_forward_alloc >> SK_MEM_QUANTUM_SHIFT,
 		   prot->memory_allocated);
 	sk->sk_forward_alloc &= SK_MEM_QUANTUM - 1;