[parisc, s390, sparc64] no need for access_ok() in futex handling

access_ok() is always true on those Signed-off-by: Al Viro <[email protected]>
chewitt · Mar 28, 2020 · dc88588 · dc88588
1 parent 0bea4f7
commit dc88588
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Showing 3 changed files with 0 additions and 7 deletions.
diff --git a/arch/parisc/include/asm/futex.h b/arch/parisc/include/asm/futex.h
@@ -39,9 +39,6 @@ arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
 	int oldval, ret;
 	u32 tmp;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
-
 	_futex_spin_lock_irqsave(uaddr, &flags);
 
 	ret = -EFAULT;

diff --git a/arch/s390/include/asm/futex.h b/arch/s390/include/asm/futex.h
@@ -28,8 +28,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
 	int oldval = 0, newval, ret;
 	mm_segment_t old_fs;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
 	old_fs = enable_sacf_uaccess();
 	switch (op) {
 	case FUTEX_OP_SET:

diff --git a/arch/sparc/include/asm/futex_64.h b/arch/sparc/include/asm/futex_64.h
@@ -35,8 +35,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
 {
 	int oldval = 0, ret, tem;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
 	if (unlikely((((unsigned long) uaddr) & 0x3UL)))
 		return -EINVAL;