will be unlocked by a single call to
.BR munlock ()
for the corresponding range or by
-.BR munlockall .
+.BR munlockall ().
Pages which are mapped to several locations or by several processes stay
locked into RAM as long as they are locked at least at one location or by
at least one process.
.B EPERM
(Linux 2.6.8 and earlier)
The calling process has insufficient privilege to call
-.BR munlockall .
+.BR munlockall ().
Under Linux the
.B CAP_IPC_LOCK
capability is required.