powerpc/booke64: Check napping in performance monitor interrupt

The performance monitor interrupt is asynchronous, so we should check
if the current processor is in napping status in the handler of this
interrupt.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 2d067049db27f1e56ca421c0a223e958125f60ad..68d74b45232d99a74c7485bc6228ebf2225703a7 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -607,6 +607,7 @@ kernel_dbg_exc:
        NORMAL_EXCEPTION_PROLOG(0x260, BOOKE_INTERRUPT_PERFORMANCE_MONITOR,
                                PROLOG_ADDITION_NONE)
        EXCEPTION_COMMON(0x260, PACA_EXGEN, INTS_DISABLE)
+       CHECK_NAPPING()
        addi    r3,r1,STACK_FRAME_OVERHEAD
        bl      .performance_monitor_exception
        b       .ret_from_except_lite