tree 3e113b81de08219cf15ba25a597b8f7cb6a5fd13
parent a251b2d513ea4116ddb5487610e4b4048c7aa397
author Al Viro <viro@zeniv.linux.org.uk> 1584671028 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1585367935 -0400

x86: get rid of user_atomic_cmpxchg_inatomic()

Only one user left; the thing had been made polymorphic back in 2013
for the sake of MPX.  No point keeping it now that MPX is gone.
Convert futex_atomic_cmpxchg_inatomic() to user_access_{begin,end}()
while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>