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fs/eventpoll.c: simply CONFIG_NET_RX_BUSY_POLL ifdefery

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... 'tis easier on the eye.

[akpm@linux-foundation.org: use inlines rather than macros]
Link: http://lkml.kernel.org/r/20180725185620.11020-1-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davidlohr Bueso 2018-08-21 21:58:19 -07:00 committed by Linus Torvalds
parent 133712a2ec
commit 514056d506
1 changed files with 16 additions and 7 deletions
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23
fs/eventpoll.c
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@ -391,7 +391,6 @@ static bool ep_busy_loop_end(void *p, unsigned long start_time)
return ep_events_available(ep) || busy_loop_timeout(start_time);
}
#endif /* CONFIG_NET_RX_BUSY_POLL */
/*
* Busy poll if globally on and supporting sockets found && no events,
@ -401,20 +400,16 @@ static bool ep_busy_loop_end(void *p, unsigned long start_time)
*/
static void ep_busy_loop(struct eventpoll *ep, int nonblock)
{
#ifdef CONFIG_NET_RX_BUSY_POLL
unsigned int napi_id = READ_ONCE(ep->napi_id);
if ((napi_id >= MIN_NAPI_ID) && net_busy_loop_on())
napi_busy_loop(napi_id, nonblock ? NULL : ep_busy_loop_end, ep);
#endif
}
static inline void ep_reset_busy_poll_napi_id(struct eventpoll *ep)
{
#ifdef CONFIG_NET_RX_BUSY_POLL
if (ep->napi_id)
ep->napi_id = 0;
#endif
}
/*
@ -422,7 +417,6 @@ static inline void ep_reset_busy_poll_napi_id(struct eventpoll *ep)
*/
static inline void ep_set_busy_poll_napi_id(struct epitem *epi)
{
#ifdef CONFIG_NET_RX_BUSY_POLL
struct eventpoll *ep;
unsigned int napi_id;
struct socket *sock;
@ -452,9 +446,24 @@ static inline void ep_set_busy_poll_napi_id(struct epitem *epi)
/* record NAPI ID for use in next busy poll */
ep->napi_id = napi_id;
#endif
}
#else
static inline void ep_busy_loop(struct eventpoll *ep, int nonblock)
{
}
static inline void ep_reset_busy_poll_napi_id(struct eventpoll *ep)
{
}
static inline void ep_set_busy_poll_napi_id(struct epitem *epi)
{
}
#endif /* CONFIG_NET_RX_BUSY_POLL */
/**
* ep_call_nested - Perform a bound (possibly) nested call, by checking
* that the recursion limit is not exceeded, and that