Commit 61b67684 authored Aug 13, 2014 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Aug 24, 2014

perf: Fix perf_poll to return proper POLLHUP value



Currently perf_poll returns POLL_HUP in case of error, which is wrong,
because poll syscall expects POLLHUP.  The POLL_HUP is meant to be used
for SIGIO state.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140811120102.GY9918@twins.programming.kicks-ass.net
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-0ywfthh4lh65swe15f6w2x2q@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 06b2afc0

kernel/events/core.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3627,7 +3627,7 @@ static unsigned int perf_poll(struct file file, poll_table wait)
		{
		struct perf_event *event = file->private_data;
		struct ring_buffer *rb;
		unsigned int events = POLL_HUP;
		unsigned int events = POLLHUP;

		poll_wait(file, &event->waitq, wait);
		/*

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