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Diffstat (limited to 'arch/nds32/include/asm/futex.h')
-rw-r--r-- | arch/nds32/include/asm/futex.h | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/arch/nds32/include/asm/futex.h b/arch/nds32/include/asm/futex.h deleted file mode 100644 index 4223f473bd36..000000000000 --- a/arch/nds32/include/asm/futex.h +++ /dev/null @@ -1,101 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2005-2017 Andes Technology Corporation - -#ifndef __NDS32_FUTEX_H__ -#define __NDS32_FUTEX_H__ - -#include <linux/futex.h> -#include <linux/uaccess.h> -#include <asm/errno.h> - -#define __futex_atomic_ex_table(err_reg) \ - " .pushsection __ex_table,\"a\"\n" \ - " .align 3\n" \ - " .long 1b, 4f\n" \ - " .long 2b, 4f\n" \ - " .popsection\n" \ - " .pushsection .fixup,\"ax\"\n" \ - "4: move %0, " err_reg "\n" \ - " b 3b\n" \ - " .popsection" - -#define __futex_atomic_op(insn, ret, oldval, tmp, uaddr, oparg) \ - smp_mb(); \ - asm volatile( \ - " movi $ta, #0\n" \ - "1: llw %1, [%2+$ta]\n" \ - " " insn "\n" \ - "2: scw %0, [%2+$ta]\n" \ - " beqz %0, 1b\n" \ - " movi %0, #0\n" \ - "3:\n" \ - __futex_atomic_ex_table("%4") \ - : "=&r" (ret), "=&r" (oldval) \ - : "r" (uaddr), "r" (oparg), "i" (-EFAULT) \ - : "cc", "memory") -static inline int -futex_atomic_cmpxchg_inatomic(u32 * uval, u32 __user * uaddr, - u32 oldval, u32 newval) -{ - int ret = 0; - u32 val, tmp, flags; - - if (!access_ok(uaddr, sizeof(u32))) - return -EFAULT; - - smp_mb(); - asm volatile (" movi $ta, #0\n" - "1: llw %1, [%6 + $ta]\n" - " sub %3, %1, %4\n" - " cmovz %2, %5, %3\n" - " cmovn %2, %1, %3\n" - "2: scw %2, [%6 + $ta]\n" - " beqz %2, 1b\n" - "3:\n " __futex_atomic_ex_table("%7") - :"+&r"(ret), "=&r"(val), "=&r"(tmp), "=&r"(flags) - :"r"(oldval), "r"(newval), "r"(uaddr), "i"(-EFAULT) - :"$ta", "memory"); - smp_mb(); - - *uval = val; - return ret; -} - -static inline int -arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) -{ - int oldval = 0, ret; - - if (!access_ok(uaddr, sizeof(u32))) - return -EFAULT; - switch (op) { - case FUTEX_OP_SET: - __futex_atomic_op("move %0, %3", ret, oldval, tmp, uaddr, - oparg); - break; - case FUTEX_OP_ADD: - __futex_atomic_op("add %0, %1, %3", ret, oldval, tmp, uaddr, - oparg); - break; - case FUTEX_OP_OR: - __futex_atomic_op("or %0, %1, %3", ret, oldval, tmp, uaddr, - oparg); - break; - case FUTEX_OP_ANDN: - __futex_atomic_op("and %0, %1, %3", ret, oldval, tmp, uaddr, - ~oparg); - break; - case FUTEX_OP_XOR: - __futex_atomic_op("xor %0, %1, %3", ret, oldval, tmp, uaddr, - oparg); - break; - default: - ret = -ENOSYS; - } - - if (!ret) - *oval = oldval; - - return ret; -} -#endif /* __NDS32_FUTEX_H__ */ |