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| author | Peter Zijlstra <peterz@infradead.org> | 2015-10-08 10:24:23 (GMT) |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-11-23 18:37:35 (GMT) |
| commit | 2a67e741bbbc022e0fadf8c6dbc3a76019ecd0cf (patch) | |
| tree | 2f06a10ebf9f27272f6de99b0da5c19c5bdde6f6 /kernel/dma.c | |
| parent | 1ec218373b8ebda821aec00bb156a9c94fad9cd4 (diff) | |
| download | linux-2a67e741bbbc022e0fadf8c6dbc3a76019ecd0cf.tar.xz | |
rcu: Create transitive rnp->lock acquisition functions
Providing RCU's memory-ordering guarantees requires that the rcu_node
tree's locking provide transitive memory ordering, which the Linux kernel's
spinlocks currently do not provide unless smp_mb__after_unlock_lock()
is used. Having a separate smp_mb__after_unlock_lock() after each and
every lock acquisition is error-prone, hard to read, and a bit annoying,
so this commit provides wrapper functions that pull in the
smp_mb__after_unlock_lock() invocations.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/dma.c')
0 files changed, 0 insertions, 0 deletions