diff options
Diffstat (limited to 'arch/powerpc/include/asm/futex.h')
| -rw-r--r-- | arch/powerpc/include/asm/futex.h | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/futex.h b/arch/powerpc/include/asm/futex.h index 88b38b37c21b..b3001f8b2c1e 100644 --- a/arch/powerpc/include/asm/futex.h +++ b/arch/powerpc/include/asm/futex.h @@ -8,14 +8,12 @@ #include <linux/uaccess.h> #include <asm/errno.h> #include <asm/synch.h> -#include <asm/asm-405.h> #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \ __asm__ __volatile ( \ PPC_ATOMIC_ENTRY_BARRIER \ "1: lwarx %0,0,%2\n" \ insn \ - PPC405_ERR77(0, %2) \ "2: stwcx. %1,0,%2\n" \ "bne- 1b\n" \ PPC_ATOMIC_EXIT_BARRIER \ @@ -35,7 +33,8 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, { int oldval = 0, ret; - pagefault_disable(); + if (!user_access_begin(uaddr, sizeof(u32))) + return -EFAULT; switch (op) { case FUTEX_OP_SET: @@ -56,11 +55,9 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, default: ret = -ENOSYS; } + user_access_end(); - pagefault_enable(); - - if (!ret) - *oval = oldval; + *oval = oldval; return ret; } @@ -72,7 +69,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, int ret = 0; u32 prev; - if (!access_ok(uaddr, sizeof(u32))) + if (!user_access_begin(uaddr, sizeof(u32))) return -EFAULT; __asm__ __volatile__ ( @@ -80,7 +77,6 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, "1: lwarx %1,0,%3 # futex_atomic_cmpxchg_inatomic\n\ cmpw 0,%1,%4\n\ bne- 3f\n" - PPC405_ERR77(0,%3) "2: stwcx. %5,0,%3\n\ bne- 1b\n" PPC_ATOMIC_EXIT_BARRIER @@ -94,7 +90,10 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, : "r" (uaddr), "r" (oldval), "r" (newval), "i" (-EFAULT) : "cc", "memory"); + user_access_end(); + *uval = prev; + return ret; } |