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| author | Jiri Olsa <jolsa@kernel.org> | 2015-01-28 18:54:38 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-04 08:07:13 +0100 |
| commit | 7c60fc0e022858e19c66289ec65cc3effc8c0b1f (patch) | |
| tree | 695b6c3d9608feb6d4861bc29cee43b8d0caa081 | |
| parent | a83fe28e2e45392464858a96745db26ac73670c8 (diff) | |
| download | linux-7c60fc0e022858e19c66289ec65cc3effc8c0b1f.tar.bz2 | |
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@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1422467678-22341-1-git-send-email-jolsa@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | kernel/events/ring_buffer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c index 146a5792b1d2..eadb95ce7aac 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); |