diff options
Diffstat (limited to 'arch/powerpc/include/asm/futex.h')
-rw-r--r-- | arch/powerpc/include/asm/futex.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/futex.h b/arch/powerpc/include/asm/futex.h index b73ab8a7ebc3..10746519b351 100644 --- a/arch/powerpc/include/asm/futex.h +++ b/arch/powerpc/include/asm/futex.h @@ -36,6 +36,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, { int oldval = 0, ret; + allow_write_to_user(uaddr, sizeof(*uaddr)); pagefault_disable(); switch (op) { @@ -62,6 +63,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, *oval = oldval; + prevent_write_to_user(uaddr, sizeof(*uaddr)); return ret; } @@ -75,6 +77,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; + allow_write_to_user(uaddr, sizeof(*uaddr)); __asm__ __volatile__ ( PPC_ATOMIC_ENTRY_BARRIER "1: lwarx %1,0,%3 # futex_atomic_cmpxchg_inatomic\n\ @@ -97,6 +100,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, : "cc", "memory"); *uval = prev; + prevent_write_to_user(uaddr, sizeof(*uaddr)); return ret; } |