tree fa06f8177e6316d751358e617cbebe4a6c2104b3
parent 5c09048c48aee54494518db236c7a505e467d01b
author Ian Kent <raven@themaw.net> 1617965934 +0800
committer Ian Kent <raven@themaw.net> 1617965934 +0800

kernfs: switch kernfs to use an rwsem

The kernfs global lock restricts the ability to perform kernfs node
lookup operations in parallel.

Change the kernfs mutex to an rwsem so that, when opportunity arises,
node searches can be done in parallel with path walk lookups.

Signed-off-by: Ian Kent <raven@themaw.net>