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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-04-17 19:08:16 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-18 00:09:05 +1000 |
| commit | 24c78586cc6798028205e12c34febf0337bcbded (patch) | |
| tree | df2de020255d500f9ff1e8980a6a920e26310448 | |
| parent | 96f391cf40ee5c9201cc7b55abe3903761e6a2e2 (diff) | |
| download | linux-24c78586cc6798028205e12c34febf0337bcbded.tar.gz | |
powerpc: Avoid an unnecessary test and branch in longjmp()
Doing the test at exit of the function avoids an unnecessary test and branch inside longjmp(). Semantics are unchanged. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/kernel/misc.S | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/misc.S b/arch/powerpc/kernel/misc.S index 384357cb8bc0..c60b70da1e4b 100644 --- a/arch/powerpc/kernel/misc.S +++ b/arch/powerpc/kernel/misc.S @@ -85,10 +85,7 @@ _GLOBAL(setjmp) blr _GLOBAL(longjmp) - PPC_LCMPI r4,0 - bne 1f - li r4,1 -1: PPC_LL r13,4*SZL(r3) + PPC_LL r13,4*SZL(r3) PPC_LL r14,5*SZL(r3) PPC_LL r15,6*SZL(r3) PPC_LL r16,7*SZL(r3) @@ -113,7 +110,9 @@ _GLOBAL(longjmp) PPC_LL r1,SZL(r3) PPC_LL r2,2*SZL(r3) mtlr r0 - mr r3,r4 + mr. r3, r4 + bnelr + li r3, 1 blr _GLOBAL(current_stack_pointer) |