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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-01-29 11:33:37 +1100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-01-29 11:33:37 +1100
commitdfd0436ad0ce139467b124c646fa65ee2635e14a (patch)
treeabf9d83c704417cdd484243c12aeffee6b185aba /arch/powerpc/kernel/entry_64.S
parentb9818c3312da66f4b83a4a2e8650628be1237cb5 (diff)
parent689dfa894c57842a05bf6dc9f97e6bb71ec5f386 (diff)
downloadlinux-dfd0436ad0ce139467b124c646fa65ee2635e14a.tar.bz2
Merge branch 'merge' into next
Merge "merge" branch to bring in various bug fixes that are going into 3.8
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
-rw-r--r--arch/powerpc/kernel/entry_64.S13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 6faf51e165a5..44c733f4f829 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -667,6 +667,19 @@ resume_kernel:
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_NEED_RESCHED
bne 1b
+
+ /*
+ * arch_local_irq_restore() from preempt_schedule_irq above may
+ * enable hard interrupt but we really should disable interrupts
+ * when we return from the interrupt, and so that we don't get
+ * interrupted after loading SRR0/1.
+ */
+#ifdef CONFIG_PPC_BOOK3E
+ wrteei 0
+#else
+ ld r10,PACAKMSR(r13) /* Get kernel MSR without EE */
+ mtmsrd r10,1 /* Update machine state */
+#endif /* CONFIG_PPC_BOOK3E */
#endif /* CONFIG_PREEMPT */
.globl fast_exc_return_irq