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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-21 16:35:08 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-04-06 15:08:42 -0400 |
| commit | 3448890c32c32c482c3ec20baa8fdd2ab4f94cc0 (patch) | |
| tree | b8eb010ea889b318923c987b5ded4bd6ce6c8983 /arch/powerpc/lib/copyuser_64.S | |
| parent | f2ed8bebee696a80f877aa436bfafed1f3336bdd (diff) | |
| download | linux-next-3448890c32c32c482c3ec20baa8fdd2ab4f94cc0.tar.gz | |
powerpc: get rid of zeroing, switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/powerpc/lib/copyuser_64.S')
| -rw-r--r-- | arch/powerpc/lib/copyuser_64.S | 35 |
1 files changed, 3 insertions, 32 deletions
diff --git a/arch/powerpc/lib/copyuser_64.S b/arch/powerpc/lib/copyuser_64.S index aee6e24e81ab..08da06e1bd72 100644 --- a/arch/powerpc/lib/copyuser_64.S +++ b/arch/powerpc/lib/copyuser_64.S @@ -319,32 +319,9 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD) blr /* - * here we have trapped again, need to clear ctr bytes starting at r3 + * here we have trapped again, amount remaining is in ctr. */ -143: mfctr r5 - li r0,0 - mr r4,r3 - mr r3,r5 /* return the number of bytes not copied */ -1: andi. r9,r4,7 - beq 3f -90: stb r0,0(r4) - addic. r5,r5,-1 - addi r4,r4,1 - bne 1b - blr -3: cmpldi cr1,r5,8 - srdi r9,r5,3 - andi. r5,r5,7 - blt cr1,93f - mtctr r9 -91: std r0,0(r4) - addi r4,r4,8 - bdnz 91b -93: beqlr - mtctr r5 -92: stb r0,0(r4) - addi r4,r4,1 - bdnz 92b +143: mfctr r3 blr /* @@ -389,10 +366,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD) ld r5,-8(r1) add r6,r6,r5 subf r3,r3,r6 /* #bytes not copied */ -190: -191: -192: - blr /* #bytes not copied in r3 */ + blr EX_TABLE(20b,120b) EX_TABLE(220b,320b) @@ -451,9 +425,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD) EX_TABLE(88b,188b) EX_TABLE(43b,143b) EX_TABLE(89b,189b) - EX_TABLE(90b,190b) - EX_TABLE(91b,191b) - EX_TABLE(92b,192b) /* * Routine to copy a whole page of data, optimized for POWER4. |