Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a6198a23 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Guard against early IPIs in flush_cache_all(). 



flush_cache_all() gets called in to when we do some early ioremapping.
Unfortunately on SDK7786 the interrupt controller itself requires
ioremapping, leading to a bit of a chicken and egg scenario. For now,
don't bother with IPI crosscalls if there aren't any other CPUs online.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent a09d2831

arch/sh/mm/cache.c

+11 −2
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * arch/sh/mm/cache.c

 *

 * Copyright (C) 1999, 2000, 2002  Niibe Yutaka

 * Copyright (C) 2002 - 2009  Paul Mundt

 * Copyright (C) 2002 - 2010  Paul Mundt

 *

 * Released under the terms of the GNU GPL v2.0.

 */
@@ -41,8 +41,17 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info, 
                                   int wait)

{

	preempt_disable();



	/*

	 * It's possible that this gets called early on when IRQs are

	 * still disabled due to ioremapping by the boot CPU, so don't

	 * even attempt IPIs unless there are other CPUs online.

	 */

	if (num_online_cpus() > 1)

		smp_call_function(func, info, wait);



	func(info);



	preempt_enable();

}