powerpc/64s/idle: Predict HMI wakeup as unlikely

In a busy system, idle wakeups can be expected from IPIs and device
interrupts.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index ebe80b5d5ce45456dffbcf0bf6f91022c66fb7bc..1ea14b96f1261c723fd0aa6674f0223c333459af 100644 (file)
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -306,7 +306,7 @@ FTR_SECTION_ELSE_NESTED(66);                                                \
        rlwinm  r0,r12,45-31,0xe;  /* P7 wake reason field is 3 bits */ \
 ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_ARCH_207S, 66);               \
        cmpwi   r0,0xa;                 /* Hypervisor maintenance ? */  \
-       bne     20f;                                                    \
+       bne+    20f;                                                    \
        /* Invoke opal call to handle hmi */                            \
        ld      r2,PACATOC(r13);                                        \
        ld      r1,PACAR1(r13);                                         \