lglock: remove online variants of lock

Optimizing the slow paths adds a lot of complexity.  If you need to
grab every lock often, you have other problems.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
(cherry picked from commit 9dd6fa03ab31bb57cee4623a689d058d222fbe68)
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>

Change-Id: I1a32a4f4e5527cb1a312868b8758c51bc86b2b88
1 file changed