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30 .Dd September 21, 2005
36 .Nd "conditionally lock and unlock Giant around entry into VFS"
42 .Fn VFS_LOCK_GIANT "struct mount *mp"
44 .Fn VFS_UNLOCK_GIANT "int vfslocked"
47 will conditionally acquire the
49 lock if the file system referenced by
51 is marked as MPSAFE or not, returning a flag indicating whether
54 set, which may later be passed to
55 .Fn VFS_UNLOCK_GIANT .
58 will typically be derived from the mount pointer in a
60 on which a VFS operation will be performed.
63 conditionally releases the
68 It is expected that the argument will be derived from the return values of
74 returns a boolean indicating whether or not
83 MPSAFE VFS support for
88 This manual page was written by
91 Non-MPSAFE file systems exist, requiring callers conditional locking and