diff options
Diffstat (limited to 'arch/s390/include/asm/futex.h')
| -rw-r--r-- | arch/s390/include/asm/futex.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/s390/include/asm/futex.h b/arch/s390/include/asm/futex.h index 9b5a3469fed9..5e97a4353147 100644 --- a/arch/s390/include/asm/futex.h +++ b/arch/s390/include/asm/futex.h @@ -26,9 +26,9 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) { int oldval = 0, newval, ret; + mm_segment_t old_fs; - load_kernel_asce(); - + old_fs = enable_sacf_uaccess(); pagefault_disable(); switch (op) { case FUTEX_OP_SET: @@ -55,6 +55,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, ret = -ENOSYS; } pagefault_enable(); + disable_sacf_uaccess(old_fs); if (!ret) *oval = oldval; @@ -65,9 +66,10 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, u32 newval) { + mm_segment_t old_fs; int ret; - load_kernel_asce(); + old_fs = enable_sacf_uaccess(); asm volatile( " sacf 256\n" "0: cs %1,%4,0(%5)\n" @@ -77,6 +79,7 @@ static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, : "=d" (ret), "+d" (oldval), "=m" (*uaddr) : "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr) : "cc", "memory"); + disable_sacf_uaccess(old_fs); *uval = oldval; return ret; } |