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FRV: Fix the preemption handling

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Fix the preemption handling in FRV code where the PREEMPT_ACTIVE value is
incorrectly loaded into the threadinfo flags rather than the threadinfo
preemption count.

Unfortunately, the code cannot be simply converted to use
preempt_schedule_irq() as is because FRV uses virtual interrupt disablement to
cut down on the cost of actually disabling interrupts and thus
local_irq_enable() doesn't actually enable interrupts.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Al Viro <viro@ZenIV.linux.org.uk>
This commit is contained in:
David Howells
2012-11-02 13:20:42 +00:00
parent eded09ccf5
commit 1ee6f5669a
1 changed files with 1 additions and 1 deletions
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2
arch/frv/kernel/entry.S
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@@ -1086,7 +1086,7 @@ __entry_preempt_need_resched:
beq icc0,#1,__entry_return_direct beq icc0,#1,__entry_return_direct
setlos #PREEMPT_ACTIVE,gr5 setlos #PREEMPT_ACTIVE,gr5
sti gr5,@(gr15,#TI_FLAGS) sti gr5,@(gr15,#TI_PRE_COUNT)
andi gr23,#~PSR_PIL,gr23 andi gr23,#~PSR_PIL,gr23
movgs gr23,psr movgs gr23,psr