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list: introduce list_next_entry() and list_prev_entry()

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Add two trivial helpers list_next_entry() and list_prev_entry(), they
can have a lot of users including list.h itself.  In fact the 1st one is
already defined in events/core.c and bnx2x_sp.c, so the patch simply
moves the definition to list.h.

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Eilon Greenstein <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2013-11-12 15:10:01 -08:00 • committed by Linus Torvalds
commit 008208c6b2
3 changed files with 16 additions and 6 deletions
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3
kernel/events/core.c
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@ -2234,9 +2234,6 @@ static void __perf_event_sync_stat(struct perf_event *event,
perf_event_update_userpage(next_event);
}
#define list_next_entry(pos, member) \
list_entry(pos->member.next, typeof(*pos), member)
static void perf_event_sync_stat(struct perf_event_context *ctx,
struct perf_event_context *next_ctx)
{