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authorMax Filippov <jcmvbkbc@gmail.com>2018-01-05 14:27:58 -0800
committerMax Filippov <jcmvbkbc@gmail.com>2018-01-05 15:55:59 -0800
commitca47480921587ae30417dd234a9f79af188e3666 (patch)
tree8855c77493e9a06d7915d83fb2add249f693572c /Documentation/features
parent32bb954dbf6db98562cb4477608dc546421caaf6 (diff)
downloadblackbird-op-linux-ca47480921587ae30417dd234a9f79af188e3666.tar.gz
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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>
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