[MIPS] Make entry.S a little more readable.

When CONFIG_PREEMPT is not set, it also moves one branch instruction from
ret_from_irq() to ret_from_exception().  Therefore we favour the return
from irq case which should be more common than the other one.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index f10b6a19f8bf7b672242dbf2dcf9bf1f495c7c13..0b78fcbf044ab563453850fe8d404ca3615b6053 100644 (file)
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -21,24 +21,21 @@
 #endif
 
 #ifndef CONFIG_PREEMPT
-       .macro  preempt_stop
-       local_irq_disable
-       .endm
 #define resume_kernel  restore_all
+#else
+#define __ret_from_irq ret_from_exception
 #endif
 
        .text
        .align  5
-FEXPORT(ret_from_irq)
-       LONG_S  s0, TI_REGS($28)
-#ifdef CONFIG_PREEMPT
-FEXPORT(ret_from_exception)
-#else
-       b       _ret_from_irq
+#ifndef CONFIG_PREEMPT
 FEXPORT(ret_from_exception)
-       preempt_stop
+       local_irq_disable                       # preempt stop
+       b       __ret_from_irq
 #endif
-FEXPORT(_ret_from_irq)
+FEXPORT(ret_from_irq)
+       LONG_S  s0, TI_REGS($28)
+FEXPORT(__ret_from_irq)
        LONG_L  t0, PT_STATUS(sp)               # returning to kernel mode?
        andi    t0, t0, KU_USER
        beqz    t0, resume_kernel