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Commit a3cf5e6b authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Need to disable preemption around smp_tsb_sync(). 



Based upon a bug report by Mariusz Kozlowski

It uses smp_call_function_masked() now, which has a preemption-disabled
requirement.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8f616cd5

arch/sparc64/mm/tsb.c

+4 −1
Original line number Diff line number Diff line 
/* arch/sparc64/mm/tsb.c

 *

 * Copyright (C) 2006 David S. Miller <davem@davemloft.net>

 * Copyright (C) 2006, 2008 David S. Miller <davem@davemloft.net>

 */



#include <linux/kernel.h>

#include <linux/preempt.h>

#include <asm/system.h>

#include <asm/page.h>

#include <asm/tlbflush.h>
@@ -415,7 +416,9 @@ void tsb_grow(struct mm_struct *mm, unsigned long tsb_index, unsigned long rss) 
		tsb_context_switch(mm);



		/* Now force other processors to do the same.  */

		preempt_disable();

		smp_tsb_sync(mm);

		preempt_enable();



		/* Now it is safe to free the old tsb.  */

		kmem_cache_free(tsb_caches[old_cache_index], old_tsb);