i386: Remove strrchr assembler implementation

The constraints in the inline assembler implementation of i386
strrchr() were incorrect and break the build with recent gcc 4.3.
Since there are only very few callers of strrchr() and none of them
are performance relevant just remove the assembler implementation
and use the C fallback instead.

[ tglx: arch/x86 adaptation ]

Cc: rguenther@suse.de
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/lib/string_32.c

@@ -160,26 +160,6 @@ char *strchr(const char * s, int c)
 EXPORT_SYMBOL(strchr);
 #endif
 
-#ifdef __HAVE_ARCH_STRRCHR
-char *strrchr(const char * s, int c)
-{
-	int d0, d1;
-	char * res;
-	asm volatile( "movb %%al,%%ah\n"
-		"1:\tlodsb\n\t"
-		"cmpb %%ah,%%al\n\t"
-		"jne 2f\n\t"
-		"leal -1(%%esi),%0\n"
-		"2:\ttestb %%al,%%al\n\t"
-		"jne 1b"
-		:"=g" (res), "=&S" (d0), "=&a" (d1)
-		:"0" (0),"1" (s),"2" (c)
-		:"memory");
-	return res;
-}
-EXPORT_SYMBOL(strrchr);
-#endif
-
 #ifdef __HAVE_ARCH_STRLEN
 size_t strlen(const char * s)
 {

include/asm-x86/string_32.h

@@ -26,9 +26,6 @@ extern int strncmp(const char *cs, const char *ct, size_t count);
 #define __HAVE_ARCH_STRCHR
 extern char *strchr(const char *s, int c);
 
-#define __HAVE_ARCH_STRRCHR
-extern char *strrchr(const char *s, int c);
-
 #define __HAVE_ARCH_STRLEN
 extern size_t strlen(const char *s);