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xtensa: fix str[n]cmp return value

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str[n]cmp functions return negative value if the first string is less
than the second, positive value if the first string is greater than the
second and zero if they are equal. This is important when these
functions are used for sorting/binary search.

With incorrect strcmp return value bsearch was always failing in the
find_symbol_in_section making it impossible to load any module.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov 2013-01-20 15:41:44 +04:00 committed by Chris Zankel
parent de73b6b1bd
commit c5a285bb1b
1 changed files with 2 additions and 2 deletions
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4
arch/xtensa/include/asm/string.h
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@ -74,7 +74,7 @@ static inline int strcmp(const char *__cs, const char *__ct)
"beqz %2, 2f\n\t"
"beq %2, %3, 1b\n"
"2:\n\t"
"sub %2, %3, %2"
"sub %2, %2, %3"
: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
: "0" (__cs), "1" (__ct));
@ -99,7 +99,7 @@ static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
"beqz %3, 2f\n\t"
"beq %2, %3, 1b\n"
"2:\n\t"
"sub %2, %3, %2"
"sub %2, %2, %3"
: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
: "0" (__cs), "1" (__ct), "r" (__cs+__n));