lockless get_write_access/deny_write_access
new helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive()
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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new helpers: atomic_inc_unless_negative()/atomic_dec_unless_positive()
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>