binder: Use wake up hint for synchronous transactions.
authorRiley Andrews <riandrews@google.com>
Thu, 29 Jun 2017 19:01:37 +0000 (12:01 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 Aug 2017 08:21:53 +0000 (10:21 +0200)
commit8fb0b0ce288d38d78685a9d6f6320339afadf709
treec1ec48d87746c744d93411649f05149755d1454a
parent51050750181c791410a7e8dc405cc909e264587b
binder: Use wake up hint for synchronous transactions.

commit 00b40d613352c623aaae88a44e5ded7c912909d7 upstream.

Use wake_up_interruptible_sync() to hint to the scheduler binder
transactions are synchronous wakeups. Disable preemption while waking
to avoid ping-ponging on the binder lock.

Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Omprakash Dhyade <odhyade@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/android/binder.c