smb: client: remove unused fid_lock

The fid_lock in struct cached_fid does not currently provide any real
synchronization. Previously, it had the intention to prevent a double
release of the dentry, but every change to cfid->dentry is already
protected either by cfid_list_lock (while the entry is in the list) or
happens after the cfid has been removed (so no other thread should find
it).

Since there is no scenario in which fid_lock prevents any race, it is
vestigial and can be removed along with its associated
spin_lock()/spin_unlock() calls.

Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>

0 files changed, 0 insertions, 0 deletions