xtensa: fix futex_atomic_cmpxchg_inatomic

Browse source

commit ca47480921 upstream.

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*.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

This commit is contained in:

Max Filippov 2018-01-05 14:27:58 -08:00 • committed by Ben Hutchings

parent c360bf2e0c

commit 7d7437f5dc

1 changed files with 10 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

arch/xtensa/include/asm/futex.h

View file