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powerpc/32: Simplify EXCEPTION_PROLOG_1 macro

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Make code more readable with a clear CONFIG_VMAP_STACK
section and a clear non CONFIG_VMAP_STACK section.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c0f16cf432d22fc80097264d94649460d3dd761d.1606285014.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2020-11-25 07:10:51 +00:00 committed by Michael Ellerman
parent c4a22611bf
commit 6285f9cff5
1 changed files with 4 additions and 6 deletions
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10
arch/powerpc/kernel/head_32.h
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@ -46,18 +46,16 @@
mfspr r1,SPRN_SPRG_THREAD
lwz r1,TASK_STACK-THREAD(r1)
addi r1, r1, THREAD_SIZE - INT_FRAME_SIZE
1:
mtcrf 0x7f, r1
bt 32 - THREAD_ALIGN_SHIFT, stack_overflow
#else
subi r11, r1, INT_FRAME_SIZE /* use r1 if kernel */
beq 1f
mfspr r11,SPRN_SPRG_THREAD
lwz r11,TASK_STACK-THREAD(r11)
addi r11, r11, THREAD_SIZE - INT_FRAME_SIZE
#endif
1:
tophys_novmstack r11, r11
#ifdef CONFIG_VMAP_STACK
mtcrf 0x7f, r1
bt 32 - THREAD_ALIGN_SHIFT, stack_overflow
1: tophys(r11, r11)
#endif
.endm