diff options
| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2015-10-02 07:59:24 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2015-10-02 08:05:21 +0200 |
| commit | ba1ed5240b2f8c724a8efa8f652a8ba391fc92dd (patch) | |
| tree | a19ab9d6a59ec9dc1e8d15da49929e4dcf863d7a /cpukit | |
| parent | powerpc: Use wrtee for e6500 multilib (diff) | |
| download | rtems-ba1ed5240b2f8c724a8efa8f652a8ba391fc92dd.tar.bz2 | |
SMP: Optimize ticket lock implementation
This reverts the relevant part of commit
da06fe948c0878057e5f563ebd3dfe40c0f1b0d2. The acquire/release order is
superfluous for the next ticket increment. The mutual exclusion is
guaranteed by the acquire load from and release store to the next
serving atomic variable.
Diffstat (limited to 'cpukit')
| -rw-r--r-- | cpukit/score/include/rtems/score/smplock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/score/include/rtems/score/smplock.h b/cpukit/score/include/rtems/score/smplock.h index ccf6b5993b..f98f38a6a3 100644 --- a/cpukit/score/include/rtems/score/smplock.h +++ b/cpukit/score/include/rtems/score/smplock.h @@ -277,7 +277,7 @@ static inline void _SMP_ticket_lock_Do_acquire( #endif my_ticket = - _Atomic_Fetch_add_uint( &lock->next_ticket, 1U, ATOMIC_ORDER_ACQ_REL ); + _Atomic_Fetch_add_uint( &lock->next_ticket, 1U, ATOMIC_ORDER_RELAXED ); #if defined( RTEMS_PROFILING ) now_serving = |