diff options
Diffstat (limited to 'arch/arm64/include/asm/futex.h')
| -rw-r--r-- | arch/arm64/include/asm/futex.h | 27 |
1 files changed, 4 insertions, 23 deletions
diff --git a/arch/arm64/include/asm/futex.h b/arch/arm64/include/asm/futex.h index 4e5f36a804b4..2a5090fb9113 100644 --- a/arch/arm64/include/asm/futex.h +++ b/arch/arm64/include/asm/futex.h @@ -51,20 +51,9 @@ : "memory") static inline int -futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *_uaddr) +arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) { - int op = (encoded_op >> 28) & 7; - int cmp = (encoded_op >> 24) & 15; - int oparg = (int)(encoded_op << 8) >> 20; - int cmparg = (int)(encoded_op << 20) >> 20; int oldval = 0, ret, tmp; - u32 __user *uaddr = __uaccess_mask_ptr(_uaddr); - - if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) - oparg = 1U << (oparg & 0x1f); - - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) - return -EFAULT; pagefault_disable(); @@ -95,17 +84,9 @@ futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *_uaddr) pagefault_enable(); - if (!ret) { - switch (cmp) { - case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; - case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; - case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; - case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; - case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; - case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; - default: ret = -ENOSYS; - } - } + if (!ret) + *oval = oldval; + return ret; } |