From 4738fa16907a933d72bbcae1b8922dc9330fde92 Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Mon, 21 Feb 2011 13:20:55 +0100 Subject: drbd: use clear_bit_unlock() where appropriate Some open-coded clear_bit(); smp_mb__after_clear_bit(); should in fact have been smp_mb__before_clear_bit(); clear_bit(); Instead, use clear_bit_unlock() to annotate the intention, and have it do the right thing. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- lib/lru_cache.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'lib/lru_cache.c') diff --git a/lib/lru_cache.c b/lib/lru_cache.c index a07e7268d7ed..9f353f7f41ca 100644 --- a/lib/lru_cache.c +++ b/lib/lru_cache.c @@ -44,8 +44,8 @@ MODULE_LICENSE("GPL"); } while (0) #define RETURN(x...) do { \ - clear_bit(__LC_PARANOIA, &lc->flags); \ - smp_mb__after_clear_bit(); return x ; } while (0) + clear_bit_unlock(__LC_PARANOIA, &lc->flags); \ + return x ; } while (0) /* BUG() if e is not one of the elements tracked by lc */ #define PARANOIA_LC_ELEMENT(lc, e) do { \ @@ -438,8 +438,7 @@ void lc_changed(struct lru_cache *lc, struct lc_element *e) hlist_add_head(&e->colision, lc_hash_slot(lc, lc->new_number)); lc->changing_element = NULL; lc->new_number = LC_FREE; - clear_bit(__LC_DIRTY, &lc->flags); - smp_mb__after_clear_bit(); + clear_bit_unlock(__LC_DIRTY, &lc->flags); RETURN(); } @@ -463,8 +462,7 @@ unsigned int lc_put(struct lru_cache *lc, struct lc_element *e) /* move it to the front of LRU. */ list_move(&e->list, &lc->lru); lc->used--; - clear_bit(__LC_STARVING, &lc->flags); - smp_mb__after_clear_bit(); + clear_bit_unlock(__LC_STARVING, &lc->flags); } RETURN(e->refcnt); } -- cgit v1.2.3