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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-02-21 10:37:54 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-02-22 00:10:16 +1100 |
| commit | 0df977eafc792a5365a7f81d8d5920132e03afad (patch) | |
| tree | 145c1adc8829075f35bbf51742de3a4430259f0f /arch/powerpc/include/asm/reg.h | |
| parent | powerpc: simplify BDI switch (diff) | |
| download | linux-dev-0df977eafc792a5365a7f81d8d5920132e03afad.tar.xz linux-dev-0df977eafc792a5365a7f81d8d5920132e03afad.zip | |
powerpc/6xx: Don't use SPRN_SPRG2 for storing stack pointer while in RTAS
When calling RTAS, the stack pointer is stored in SPRN_SPRG2
in order to be able to restore it in case of machine check in RTAS.
As machine check is not a perfomance critical path, this patch
frees SPRN_SPRG2 by using a field in thread struct instead.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/reg.h')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 1c98ef1f2d5b..371ef6e8248e 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -1167,7 +1167,6 @@ #ifdef CONFIG_PPC_BOOK3S_32 #define SPRN_SPRG_SCRATCH0 SPRN_SPRG0 #define SPRN_SPRG_SCRATCH1 SPRN_SPRG1 -#define SPRN_SPRG_RTAS SPRN_SPRG2 #define SPRN_SPRG_603_LRU SPRN_SPRG4 #endif |