commit 1f1c4d0122eebd204468684f21f0270ea8a4999d
author Christophe Leroy <christophe.leroy@c-s.fr> Sat Dec 21 08:32:23 2019 +0000
committer Michael Ellerman <mpe@ellerman.id.au> Sun Jan 26 22:15:08 2020 +1100
tree 9360be5fb9a51f8e25f9dd61f28f68be82c29ddb
parent 39bccfd164970557c5cfc60b2db029f70542549f

powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h

This patch creates a macro for the very first part of
exception prolog, this will help when implementing
CONFIG_VMAP_STACK

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2249fe62f481121a180e9655ad2b998093f318f3.1576916812.git.christophe.leroy@c-s.fr

arch/powerpc/kernel/head_32.h

diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index b2ca8c9..8e345f8 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h
@@ -10,13 +10,16 @@
  * We assume sprg3 has the physical address of the current
  * task's thread_struct.
  */
-
 .macro EXCEPTION_PROLOG
+	EXCEPTION_PROLOG_0
+	EXCEPTION_PROLOG_1
+	EXCEPTION_PROLOG_2
+.endm
+
+.macro EXCEPTION_PROLOG_0
 	mtspr	SPRN_SPRG_SCRATCH0,r10
 	mtspr	SPRN_SPRG_SCRATCH1,r11
 	mfcr	r10
-	EXCEPTION_PROLOG_1
-	EXCEPTION_PROLOG_2
 .endm
 
 .macro EXCEPTION_PROLOG_1