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| author | Oleg Nesterov <oleg@redhat.com> | 2017-06-30 22:13:59 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-25 19:08:58 +0200 |
| commit | f274f1e72d7171c80c8c790040e47a23a74796b6 (patch) | |
| tree | 1e69960fc748abd6fd3454a9a782851f200ff92f /kernel/Makefile | |
| parent | net/netfilter/nf_conntrack_core: Fix net_conntrack_lock() (diff) | |
| download | linux-f274f1e72d7171c80c8c790040e47a23a74796b6.tar.xz linux-f274f1e72d7171c80c8c790040e47a23a74796b6.zip | |
task_work: Replace spin_unlock_wait() with lock/unlock pair
There is no agreed-upon definition of spin_unlock_wait()'s semantics,
and it appears that all callers could do just as well with a lock/unlock
pair. This commit therefore replaces the spin_unlock_wait() call in
task_work_run() with a spin_lock_irq() and a spin_unlock_irq() aruond
the cmpxchg() dequeue loop. This should be safe from a performance
perspective because ->pi_lock is local to the task and because calls to
the other side of the race, task_work_cancel(), should be rare.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions