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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
arch/arc/include/asm/futex.h
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@ -75,10 +75,12 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
{
int oldval = 0, ret;
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
#ifndef CONFIG_ARC_HAS_LLSC
preempt_disable(); /* to guarantee atomic r-m-w of futex op */
#endif
pagefault_disable();
switch (op) {
case FUTEX_OP_SET:
@ -101,7 +103,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
ret = -ENOSYS;
}
pagefault_enable();
#ifndef CONFIG_ARC_HAS_LLSC
preempt_enable();
#endif