Contributors: 2
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Rich Felker |
56 |
98.25% |
1 |
50.00% |
| Greg Kroah-Hartman |
1 |
1.75% |
1 |
50.00% |
| Total |
57 |
|
2 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_FUTEX_LLSC_H
#define __ASM_SH_FUTEX_LLSC_H
static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
u32 __user *uaddr,
u32 oldval, u32 newval)
{
int err = 0;
__asm__ __volatile__(
"synco\n"
"1:\n\t"
"movli.l @%2, r0\n\t"
"mov r0, %1\n\t"
"cmp/eq %1, %4\n\t"
"bf 2f\n\t"
"mov %5, r0\n\t"
"movco.l r0, @%2\n\t"
"bf 1b\n"
"2:\n\t"
"synco\n\t"
#ifdef CONFIG_MMU
".section .fixup,\"ax\"\n"
"3:\n\t"
"mov.l 4f, %0\n\t"
"jmp @%0\n\t"
" mov %3, %0\n\t"
".balign 4\n"
"4: .long 2b\n\t"
".previous\n"
".section __ex_table,\"a\"\n\t"
".long 1b, 3b\n\t"
".previous"
#endif
:"+r" (err), "=&r" (*uval)
:"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval)
:"t", "memory", "r0");
if (err) return err;
return 0;
}
#endif /* __ASM_SH_FUTEX_LLSC_H */