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| author | Max Filippov <jcmvbkbc@gmail.com> | 2018-01-05 14:27:58 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2018-01-05 15:55:59 -0800 |
| commit | ca47480921587ae30417dd234a9f79af188e3666 (patch) | |
| tree | 8855c77493e9a06d7915d83fb2add249f693572c /Documentation/features/debug | |
| parent | 32bb954dbf6db98562cb4477608dc546421caaf6 (diff) | |
xtensa: fix futex_atomic_cmpxchg_inatomic
Return 0 if the operation was successful, not the userspace memory
value. Check that userspace value equals passed oldval, not itself.
Don't update *uval if the value wasn't read from userspace memory.
This fixes process hang due to infinite loop in futex_lock_pi.
It also fixes a bunch of glibc tests nptl/tst-mutexpi*.
Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'Documentation/features/debug')
0 files changed, 0 insertions, 0 deletions