diff options
| author |   Jan Kara <jack@suse.cz> | 2014-12-12 16:58:39 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-13 12:42:53 -0800 |
| commit | 37d469e7673a663cbf38360beb1eaa3224c9d272 (patch) | |
| tree | b980de73eb2a32cb759d57792c0028e634350b80 /include/linux/fsnotify_backend.h | |
| parent | fsnotify: unify inode and mount marks handling (diff) | |
| download | linux-dev-37d469e7673a663cbf38360beb1eaa3224c9d272.tar.xz linux-dev-37d469e7673a663cbf38360beb1eaa3224c9d272.zip | |
fsnotify: remove destroy_list from fsnotify_mark
destroy_list is used to track marks which still need waiting for srcu
period end before they can be freed. However by the time mark is added to
destroy_list it isn't in group's list of marks anymore and thus we can
reuse fsnotify_mark->g_list for queueing into destroy_list. This saves
two pointers for each fsnotify_mark.
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Eric Paris <eparis@redhat.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fsnotify_backend.h')
| -rw-r--r-- | include/linux/fsnotify_backend.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index 442847a02b8f..0f313f93c586 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -212,7 +212,11 @@ struct fsnotify_mark { * in kernel that found and may be using this mark. */ atomic_t refcnt; /* active things looking at this mark */ struct fsnotify_group *group; /* group this mark is for */ - struct list_head g_list; /* list of marks by group->i_fsnotify_marks */ + struct list_head g_list; /* list of marks by group->i_fsnotify_marks + * Also reused for queueing mark into + * destroy_list when it's waiting for + * the end of SRCU period before it can + * be freed */ spinlock_t lock; /* protect group and inode */ struct hlist_node obj_list; /* list of marks for inode / vfsmount */ struct list_head free_list; /* tmp list used when freeing this mark */ @@ -227,7 +231,6 @@ struct fsnotify_mark { #define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x08 #define FSNOTIFY_MARK_FLAG_ALIVE 0x10 unsigned int flags; /* vfsmount or inode mark? */ - struct list_head destroy_list; void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */ }; |