Release 4.14 arch/microblaze/include/asm/futex.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_MICROBLAZE_FUTEX_H
#define _ASM_MICROBLAZE_FUTEX_H
#ifdef __KERNEL__
#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
({ \
__asm__ __volatile__ ( \
"1: lwx %0, %2, r0; " \
insn \
"2: swx %1, %2, r0; \
addic %1, r0, 0; \
bnei %1, 1b; \
3: \
.section .fixup,\"ax\"; \
4: brid 3b; \
addik %1, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,4b,2b,4b; \
.previous;" \
: "=&r" (oldval), "=&r" (ret) \
: "r" (uaddr), "i" (-EFAULT), "r" (oparg) \
); \
})
static inline int
arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int oldval = 0, ret;
pagefault_disable();
switch (op) {
case FUTEX_OP_SET:
__futex_atomic_op("or %1,%4,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
__futex_atomic_op("add %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
__futex_atomic_op("or %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
__futex_atomic_op("andn %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_XOR:
__futex_atomic_op("xor %1,%0,%4;", ret, oldval, uaddr, oparg);
break;
default:
ret = -ENOSYS;
}
pagefault_enable();
if (!ret)
*oval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michal Simek | 133 | 91.72% | 2 | 50.00% |
| Jiri Slaby | 11 | 7.59% | 1 | 25.00% |
| Michel Lespinasse | 1 | 0.69% | 1 | 25.00% |
| Total | 145 | 100.00% | 4 | 100.00% |
static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
u32 oldval, u32 newval)
{
int ret = 0, cmp;
u32 prev;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
__asm__ __volatile__ ("1: lwx %1, %3, r0; \
cmp %2, %1, %4; \
bnei %2, 3f; \
2: swx %5, %3, r0; \
addic %2, r0, 0; \
bnei %2, 1b; \
3: \
.section .fixup,\"ax\"; \
4: brid 3b; \
addik %0, r0, %6; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,4b,2b,4b; \
.previous;" \
: "+r" (ret), "=&r" (prev), "=&r"(cmp) \
: "r" (uaddr), "r" (oldval), "r" (newval), "i" (-EFAULT));
*uval = prev;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michal Simek | 40 | 64.52% | 1 | 25.00% |
| Michel Lespinasse | 21 | 33.87% | 2 | 50.00% |
| Meyer, Kirk | 1 | 1.61% | 1 | 25.00% |
| Total | 62 | 100.00% | 4 | 100.00% |
#endif /* __KERNEL__ */
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michal Simek | 212 | 85.83% | 4 | 44.44% |
| Michel Lespinasse | 22 | 8.91% | 2 | 22.22% |
| Jiri Slaby | 11 | 4.45% | 1 | 11.11% |
| Meyer, Kirk | 1 | 0.40% | 1 | 11.11% |
| Greg Kroah-Hartman | 1 | 0.40% | 1 | 11.11% |
| Total | 247 | 100.00% | 9 | 100.00% |
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