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author | Nicholas Piggin <npiggin@gmail.com> | 2023-10-16 22:43:01 +1000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-10-20 22:43:34 +1100 |
commit | f6568647382c667912245c8d07aa26c9c6d4d0c8 (patch) | |
tree | e3ad3d43de16f0155cb7aa7f4e7b742948a226eb /ipc | |
parent | ea142e590aec55ba40c5affb4d49e68c713c63dc (diff) |
powerpc/qspinlock: stop queued waiters trying to set lock sleepy
If a queued waiter notices the lock owner or the previous waiter has
been preempted, it attempts to mark the lock sleepy, but it does this
as a try-set operation using the original lock value it got when
queueing, which will become stale as the queue progresses, and the
try-set will fail. Drop this and just set the sleepy seen clock.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Shrikanth Hegde <sshegde@linux.vnet.ibm.com>
Reviewed-by: "Nysal Jan K.A" <nysal@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231016124305.139923-3-npiggin@gmail.com
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions