Al Viro 5423426a79
switch do_new_mount_fc() to fc_mount() ...
Prior to the call of do_new_mount_fc() the caller has just done successful
vfs_get_tree(). Then do_new_mount_fc() does several checks on resulting
superblock, and either does fc_drop_locked() and returns an error or
proceeds to unlock the superblock and call vfs_create_mount().
The thing is, there's no reason to delay that unlock + vfs_create_mount() -
the tests do not rely upon the state of ->s_umount and
fc_drop_locked()
put_fs_context()
is equivalent to
unlock ->s_umount
put_fs_context()
Doing vfs_create_mount() before the checks allows us to move vfs_get_tree()
from caller to do_new_mount_fc() and collapse it with vfs_create_mount()
into an fc_mount() call.
Reviewed-by: Christian Brauner <brauner@kernel.org >
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk >
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5423426a79