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futex: arch_futex_atomic_op_inuser() calling conventions change

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Move access_ok() in and pagefault_enable()/pagefault_disable() out.
Mechanical conversion only - some instances don't really need
a separate access_ok() at all (e.g. the ones only using
get_user()/put_user(), or architectures where access_ok()
is always true); we'll deal with that in followups.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-02-16 10:17:27 -05:00
parent bb6d3fb354
commit a08971e948
20 changed files with 43 additions and 57 deletions
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5
kernel/futex.c
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@@ -1723,10 +1723,9 @@ static int futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *uaddr)
oparg = 1 << oparg;
}
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
pagefault_disable();
ret = arch_futex_atomic_op_inuser(op, oparg, &oldval, uaddr);
pagefault_enable();
if (ret)
return ret;