Commit b55e81b9 authored by David S. Miller's avatar David S. Miller
Browse files

sparc32: Remove inline strncmp "optimization" for constant counts.



Let the compiler do stuff like this.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent afaedde7
......@@ -61,68 +61,7 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
extern __kernel_size_t strlen(const char *);
#define __HAVE_ARCH_STRNCMP
extern int __strncmp(const char *, const char *, __kernel_size_t);
static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
{
register int retval;
switch(count) {
case 0: return 0;
case 1: return (src[0] - dest[0]);
case 2: retval = (src[0] - dest[0]);
if(!retval && src[0])
retval = (src[1] - dest[1]);
return retval;
case 3: retval = (src[0] - dest[0]);
if(!retval && src[0]) {
retval = (src[1] - dest[1]);
if(!retval && src[1])
retval = (src[2] - dest[2]);
}
return retval;
case 4: retval = (src[0] - dest[0]);
if(!retval && src[0]) {
retval = (src[1] - dest[1]);
if(!retval && src[1]) {
retval = (src[2] - dest[2]);
if (!retval && src[2])
retval = (src[3] - dest[3]);
}
}
return retval;
case 5: retval = (src[0] - dest[0]);
if(!retval && src[0]) {
retval = (src[1] - dest[1]);
if(!retval && src[1]) {
retval = (src[2] - dest[2]);
if (!retval && src[2]) {
retval = (src[3] - dest[3]);
if (!retval && src[3])
retval = (src[4] - dest[4]);
}
}
}
return retval;
default:
retval = (src[0] - dest[0]);
if(!retval && src[0]) {
retval = (src[1] - dest[1]);
if(!retval && src[1]) {
retval = (src[2] - dest[2]);
if(!retval && src[2])
retval = __strncmp(src+3,dest+3,count-3);
}
}
return retval;
}
}
#undef strncmp
#define strncmp(__arg0, __arg1, __arg2) \
(__builtin_constant_p(__arg2) ? \
__constant_strncmp(__arg0, __arg1, __arg2) : \
__strncmp(__arg0, __arg1, __arg2))
extern int strncmp(const char *, const char *, __kernel_size_t);
#endif /* !EXPORT_SYMTAB_STROPS */
......
......@@ -56,8 +56,6 @@ extern int __divdi3(int, int);
extern void (*__copy_1page)(void *, const void *);
extern void (*bzero_1page)(void *);
extern int __strncmp(const char *, const char *, __kernel_size_t);
extern void ___rw_read_enter(void);
extern void ___rw_read_try(void);
extern void ___rw_read_exit(void);
......@@ -81,9 +79,6 @@ EXPORT_SYMBOL(__copy_1page);
EXPORT_SYMBOL(__memmove);
EXPORT_SYMBOL(bzero_1page);
/* string functions */
EXPORT_SYMBOL(__strncmp);
/* Moving data to/from/in userspace. */
EXPORT_SYMBOL(__copy_user);
......
......@@ -5,8 +5,7 @@
.text
.align 4
.global __strncmp, strncmp
__strncmp:
.global strncmp
strncmp:
mov %o0, %g3
mov 0, %o3
......
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