Commit-ID: 7c60fc0e022858e19c66289ec65cc3effc8c0b1f
Gitweb: http://git.kernel.org/tip/7c60fc0e022858e19c66289ec65cc3effc8c0b1f
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Wed, 28 Jan 2015 18:54:38 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 4 Feb 2015 08:07:13 +0100
perf: Use POLLIN instead of POLL_IN for perf poll data in flag
Currently we flag available data (via poll syscall) on perf fd with
POLL_IN macro, which is normally used for SIGIO interface.
We've been lucky, because POLLIN (0x1) is subset of POLL_IN (0x20001)
and sys_poll (do_pollfd function) cut the extra bit out (0x20000).
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1422467678-22341-1-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/events/ring_buffer.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index 146a579..eadb95c 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -13,12 +13,13 @@
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/circ_buf.h>
+#include <linux/poll.h>
#include "internal.h"
static void perf_output_wakeup(struct perf_output_handle *handle)
{
- atomic_set(&handle->rb->poll, POLL_IN);
+ atomic_set(&handle->rb->poll, POLLIN);
handle->event->pending_wakeup = 1;
irq_work_queue(&handle->event->pending);
--
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