tree a4e4412794927eb053a440769510c453d046c43d
parent c3aed16680cd0c0e5abf1bfc0dc1338e6a41b29f
author Al Viro <viro@zeniv.linux.org.uk> 1568777487 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1568777487 -0400

autofs: don't bother with atomics for ino->count

All writers are serialized on inode->i_rwsem.  So are the readers
outside of expire.c.  And the readers in expire.c are in the
code that really doesn't care about narrow races - it's looking
for expiry candidates and its callers have to cope with the
possibility of a good candidate becoming busy right under them.

No point bothering with atomic operations - just use int and
mark the non-serialized readers with READ_ONCE().

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