m32r: Exit ei_handler directly for no IRQ case or IPI operations

If no IRQ request is found in the IRQ check of ei_handler,
we can exit directly by jumping "restore_all", instead of via
"ret_from_intr".

This modification is also likely effective for IPI operations,
because scheduler call never happen at the exit of IPIs.

Signed-off-by: Hitoshi Yamamoto <hitoshiy@linux-m32r.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S
index 07d95a4f51a2..4b3a7742fe47 100644
--- a/arch/m32r/kernel/entry.S
+++ b/arch/m32r/kernel/entry.S
@@ -333,7 +333,7 @@ ENTRY(ei_handler)
         .fillinsn
 1:
         addi    sp, #4
-        bra     ret_to_intr
+        bra     restore_all
         .fillinsn
 2:
         srli    r0, #2
@@ -382,7 +382,6 @@ check_end:
         pop     r14
         seth    r0, #shigh(M32R_ICU_IMASK_ADDR)
         st      r14, @(low(M32R_ICU_IMASK_ADDR),r0)
-ret_to_intr:
         bra  ret_from_intr
 
 /*