MN10300: Fix the preemption resume_kernel() routine
Fix the preemption resume_kernel() routine by inverting the test to see
whether interrupts are off (IM7 is all enabled, not all disabled).
Furthermore, interrupts should be disabled on entry to resume_kernel() so that
they're correctly set for jumping to restore_all() and doing the need
reschedule test.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S
index b7cbb14..62fba8a 100644
--- a/arch/mn10300/kernel/entry.S
+++ b/arch/mn10300/kernel/entry.S
@@ -180,6 +180,7 @@
#ifdef CONFIG_PREEMPT
ENTRY(resume_kernel)
+ __cli
mov (TI_preempt_count,a2),d0 # non-zero preempt_count ?
cmp 0,d0
bne restore_all
@@ -190,7 +191,7 @@
mov (REG_EPSW,fp),d0
and EPSW_IM,d0
cmp EPSW_IM_7,d0 # interrupts off (exception path) ?
- beq restore_all
+ bne restore_all
call preempt_schedule_irq[],0
jmp need_resched
#endif