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| author | Tao Chen <chen.dylane@linux.dev> | 2025-03-14 11:00:36 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-10 14:41:33 +0200 |
| commit | a1e6f1674df9fb1b09a7c53e6180e15912de1fb7 (patch) | |
| tree | 864713ea96b71f7368eba68cb5db3299ff756e42 /arch/x86/entry/common.c | |
| parent | 19461bcc0af8f88130c8a28d2253a6e4f0c96c31 (diff) | |
perf/ring_buffer: Allow the EPOLLRDNORM flag for poll
[ Upstream commit c96fff391c095c11dc87dab35be72dee7d217cde ]
The poll man page says POLLRDNORM is equivalent to POLLIN. For poll(),
it seems that if user sets pollfd with POLLRDNORM in userspace, perf_poll
will not return until timeout even if perf_output_wakeup called,
whereas POLLIN returns.
Fixes: 76369139ceb9 ("perf: Split up buffer handling from core code")
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250314030036.2543180-1-chen.dylane@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86/entry/common.c')
0 files changed, 0 insertions, 0 deletions