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net/sock: Update memalloc_socks static key to modern api

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No changes in refcount semantics -- key init is false; replace

static_key_slow_inc|dec   with   static_branch_inc|dec
static_key_false          with   static_branch_unlikely

Added a '_key' suffix to memalloc_socks, for better self
documentation.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Davidlohr Bueso 2018-05-08 09:06:59 -07:00 committed by David S. Miller
parent 5263a98f16
commit a7950ae821
2 changed files with 6 additions and 6 deletions
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4
include/net/sock.h
View File

@ -808,10 +808,10 @@ static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
}
#ifdef CONFIG_NET
extern struct static_key memalloc_socks;
DECLARE_STATIC_KEY_FALSE(memalloc_socks_key);
static inline int sk_memalloc_socks(void)
{
return static_key_false(&memalloc_socks);
return static_branch_unlikely(&memalloc_socks_key);
}
#else

8
net/core/sock.c
View File

@ -327,8 +327,8 @@ EXPORT_SYMBOL(sysctl_optmem_max);
int sysctl_tstamp_allow_data __read_mostly = 1;
struct static_key memalloc_socks = STATIC_KEY_INIT_FALSE;
EXPORT_SYMBOL_GPL(memalloc_socks);
DEFINE_STATIC_KEY_FALSE(memalloc_socks_key);
EXPORT_SYMBOL_GPL(memalloc_socks_key);
/**
* sk_set_memalloc - sets %SOCK_MEMALLOC
@ -342,7 +342,7 @@ void sk_set_memalloc(struct sock *sk)
{
sock_set_flag(sk, SOCK_MEMALLOC);
sk->sk_allocation |= __GFP_MEMALLOC;
static_key_slow_inc(&memalloc_socks);
static_branch_inc(&memalloc_socks_key);
}
EXPORT_SYMBOL_GPL(sk_set_memalloc);
@ -350,7 +350,7 @@ void sk_clear_memalloc(struct sock *sk)
{
sock_reset_flag(sk, SOCK_MEMALLOC);
sk->sk_allocation &= ~__GFP_MEMALLOC;
static_key_slow_dec(&memalloc_socks);
static_branch_dec(&memalloc_socks_key);
/*
* SOCK_MEMALLOC is allowed to ignore rmem limits to ensure forward