FRV: Fix the preemption handling
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>
diff --git a/arch/frv/kernel/entry.S b/arch/frv/kernel/entry.S
index ee0beb3..d64c526 100644
--- a/arch/frv/kernel/entry.S
+++ b/arch/frv/kernel/entry.S
@@ -1086,7 +1086,7 @@
beq icc0,#1,__entry_return_direct
setlos #PREEMPT_ACTIVE,gr5
- sti gr5,@(gr15,#TI_FLAGS)
+ sti gr5,@(gr15,#TI_PRE_COUNT)
andi gr23,#~PSR_PIL,gr23
movgs gr23,psr
