Al Viro 161aff1d93 LOOKUP_MOUNTPOINT: fold path_mountpointat() into path_lookupat()
New LOOKUP flag, telling path_lookupat() to act as path_mountpointat().
IOW, traverse mounts at the final point and skip revalidation of the
location where it ends up.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-13 21:08:17 -04:00
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