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 (file)
--- a/arch/mn10300/kernel/entry.S
+++ b/arch/mn10300/kernel/entry.S
@@ -180,6 +180,7 @@ ENTRY(resume_userspace)
 
 #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 @@ need_resched:
        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