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powerpc/64s/paca: EX_LR can be merged with EX_DAR 

EX_LR is used only for a small section of the SLB miss handler.
Merge it with EX_DAR.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2017-05-21 23:15:48 +10:00 committed by Michael Ellerman
parent 36670fcf01
commit dbeea1d6b4
1 changed files with 12 additions and 5 deletions
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17
arch/powerpc/include/asm/exception-64s.h
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@ -46,12 +46,19 @@
#define EX_DSISR 48
#define EX_CCR 52
#define EX_R3 56
#define EX_LR 64
#define EX_CFAR 72
#define EX_PPR 80 /* SMT thread status register (priority) */
#define EX_CTR 88
#define EX_CFAR 64
#define EX_PPR 72
#define EX_CTR 80
#define EX_SIZE 12 /* size in u64 units */
#define EX_SIZE 11 /* size in u64 units */
/*
* EX_LR is only used in EXSLB and where it does not overlap with EX_DAR
* EX_CCR similarly with DSISR, but being 4 byte registers there is a hole
* in the save area so it's not necessary to overlap them. Could be used
* for future savings though if another 4 byte register was to be saved.
*/
#define EX_LR EX_DAR
#ifdef CONFIG_RELOCATABLE
#define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \