tree f16645c5a57ce9221e2c6ced11b73789ea9d242c
parent 5e0574292ad48dcdf48ef90a47da862c21d649a6
author Vineet Gupta <vgupta@synopsys.com> 1438868466 +0530
committer Vineet Gupta <vgupta@synopsys.com> 1440074761 +0530

ARC: ensure futex ops are atomic in !LLSC config

W/o hardware assisted atomic r-m-w the best we can do is to disable
preemption.

Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Michel Lespinasse <walken@google.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>