powerpc: Remove assembly versions of strcpy, strcat, strlen and strcmp

A number of our assembly implementations of string functions do not
align their hot loops. I was going to align them manually, but I
realised that they are are almost instruction for instruction
identical to what gcc produces, with the advantage that gcc does
align them.

In light of that, let's just remove the assembly versions.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
index e40010a..da3cdff 100644 (file)
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -3,12 +3,8 @@
 
 #ifdef __KERNEL__
 
-#define __HAVE_ARCH_STRCPY
 #define __HAVE_ARCH_STRNCPY
-#define __HAVE_ARCH_STRLEN
-#define __HAVE_ARCH_STRCMP
 #define __HAVE_ARCH_STRNCMP
-#define __HAVE_ARCH_STRCAT
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY
 #define __HAVE_ARCH_MEMMOVE

diff --git a/arch/powerpc/lib/ppc_ksyms.c b/arch/powerpc/lib/ppc_ksyms.c
index c422812..ae69d84 100644 (file)
--- a/arch/powerpc/lib/ppc_ksyms.c
+++ b/arch/powerpc/lib/ppc_ksyms.c
@@ -9,11 +9,7 @@ EXPORT_SYMBOL(memmove);
 EXPORT_SYMBOL(memcmp);
 EXPORT_SYMBOL(memchr);
 
-EXPORT_SYMBOL(strcpy);
 EXPORT_SYMBOL(strncpy);
-EXPORT_SYMBOL(strcat);
-EXPORT_SYMBOL(strlen);
-EXPORT_SYMBOL(strcmp);
 EXPORT_SYMBOL(strncmp);
 
 #ifndef CONFIG_GENERIC_CSUM

diff --git a/arch/powerpc/lib/string.S b/arch/powerpc/lib/string.S
index c80fb49..a947056 100644 (file)
--- a/arch/powerpc/lib/string.S
+++ b/arch/powerpc/lib/string.S
@@ -16,15 +16,6 @@
        PPC_LONG_ALIGN
        .text
        
-_GLOBAL(strcpy)
-       addi    r5,r3,-1
-       addi    r4,r4,-1
-1:     lbzu    r0,1(r4)
-       cmpwi   0,r0,0
-       stbu    r0,1(r5)
-       bne     1b
-       blr
-
 /* This clears out any unused part of the destination buffer,
    just as the libc version does.  -- paulus */
 _GLOBAL(strncpy)
@@ -45,30 +36,6 @@ _GLOBAL(strncpy)
        bdnz    2b
        blr
 
-_GLOBAL(strcat)
-       addi    r5,r3,-1
-       addi    r4,r4,-1
-1:     lbzu    r0,1(r5)
-       cmpwi   0,r0,0
-       bne     1b
-       addi    r5,r5,-1
-1:     lbzu    r0,1(r4)
-       cmpwi   0,r0,0
-       stbu    r0,1(r5)
-       bne     1b
-       blr
-
-_GLOBAL(strcmp)
-       addi    r5,r3,-1
-       addi    r4,r4,-1
-1:     lbzu    r3,1(r5)
-       cmpwi   1,r3,0
-       lbzu    r0,1(r4)
-       subf.   r3,r0,r3
-       beqlr   1
-       beq     1b
-       blr
-
 _GLOBAL(strncmp)
        PPC_LCMPI 0,r5,0
        beq-    2f
@@ -85,14 +52,6 @@ _GLOBAL(strncmp)
 2:     li      r3,0
        blr
 
-_GLOBAL(strlen)
-       addi    r4,r3,-1
-1:     lbzu    r0,1(r4)
-       cmpwi   0,r0,0
-       bne     1b
-       subf    r3,r3,r4
-       blr
-
 #ifdef CONFIG_PPC32
 _GLOBAL(memcmp)
        PPC_LCMPI 0,r5,0