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powerpc/mm: Fix the call trace when resumed from hibernation

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In SMP mode, the kernel would produce call trace when resumed
	from hibernation. The reason is when the function destroy_context
	is called to drop the resuming mm context, the mm->context.active
	is 1 which is wrong and should be zero.
	We pass the current->active_mm as previous mm context to function
	switch_mmu_context to decrease the context.active by 1.

	In UP mode, there is no effect.

Signed-off-by: Tang Yuantian <b29983@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Tang Yuantian 2011-08-16 19:51:33 +00:00 committed by Benjamin Herrenschmidt
parent 9c57a32b2f
commit 0330581ab3
1 changed files with 1 additions and 1 deletions
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arch/powerpc/kernel/swsusp.c
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@ -33,6 +33,6 @@ void save_processor_state(void)
void restore_processor_state(void)
{
#ifdef CONFIG_PPC32
switch_mmu_context(NULL, current->active_mm);
switch_mmu_context(current->active_mm, current->active_mm);
#endif
}