x86, locking/rwlocks: Enable qrwlocks on x86

Make x86 use the fair rwlock_t.

Implement the custom queue_write_unlock() for best performance.

Signed-off-by: Waiman Long <[email protected]>
[peterz: near complete rewrite]
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Dave Jones <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Raghavendra K T <[email protected]>
Cc: "Paul E.McKenney" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions