Module: xenomai-jki Branch: for-upstream Commit: d1da9640386a8b256e1475465d818ed87d5dc366 URL: http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=d1da9640386a8b256e1475465d818ed87d5dc366
Author: Jan Kiszka <jan.kis...@siemens.com> Date: Mon Mar 1 18:00:00 2010 +0100 RTDM: Add smp barrier to rtdm_context_unlock rtdm_context_unlock() is part of the driver API, and is therefore only be called without holding the serializing rt_fildes_lock. Ensure proper ordering of any access to the protected rtdm_dev_context by adding an smp barrier for atomic_dec to rtdm_context_unlock(). Signed-off-by: Jan Kiszka <jan.kis...@siemens.com> --- include/rtdm/rtdm_driver.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/include/rtdm/rtdm_driver.h b/include/rtdm/rtdm_driver.h index 1697b5c..0fc1496 100644 --- a/include/rtdm/rtdm_driver.h +++ b/include/rtdm/rtdm_driver.h @@ -554,6 +554,7 @@ static inline void rtdm_context_lock(struct rtdm_dev_context *context) static inline void rtdm_context_unlock(struct rtdm_dev_context *context) { + smp_mb__before_atomic_dec(); atomic_dec(&context->close_lock_count); } _______________________________________________ Xenomai-git mailing list Xenomai-git@gna.org https://mail.gna.org/listinfo/xenomai-git