diff options
| author | clefru <[email protected]> | 2017-01-19 23:41:38 +0100 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2017-01-19 14:41:38 -0800 |
| commit | 2d4d81c485bd5ed3ccaf1580c4efdc0ecdbc52ee (patch) | |
| tree | a45a373fb269403a1e4385db264540c63ff97f8b /module/spl | |
| parent | 5cb44271b4c0b01afe5b84366e247f6d087df399 (diff) | |
Reimplement rt_mutex_owner to fix build with DEBUG & PREEMPT_RT_FULL
rt_mutex_owner is internal to kernel/locking/rtmutex_common.h and
inaccessible for SPL via the public kernel headers. The way of
accessing the owner has been stable since at least 3.13 ([1], [2]),
which is masking the lowest bit in the owner pointer in rt_mutex. We
do the same.
[1] http://lxr.free-electrons.com/source/kernel/locking/rtmutex_common.h?v=3.13#L99
[2] http://lxr.free-electrons.com/source/kernel/locking/rtmutex_common.h?v=4.9#L78
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Clemens Fruhwirth <[email protected]>
Closes #593
Diffstat (limited to 'module/spl')
| -rw-r--r-- | module/spl/spl-rwlock.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/module/spl/spl-rwlock.c b/module/spl/spl-rwlock.c index 9e96c4f27..d99ef4f92 100644 --- a/module/spl/spl-rwlock.c +++ b/module/spl/spl-rwlock.c @@ -35,11 +35,15 @@ #if defined(CONFIG_PREEMPT_RT_FULL) #include <linux/rtmutex.h> +#define RT_MUTEX_OWNER_MASKALL 1UL static int __rwsem_tryupgrade(struct rw_semaphore *rwsem) { - ASSERT(rt_mutex_owner(&rwsem->lock) == current); + + ASSERT((struct task_struct *) + ((unsigned long)rwsem->lock.owner & ~RT_MUTEX_OWNER_MASKALL) == + current); /* * Under the realtime patch series, rwsem is implemented as a |