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authorNeilBrown <neilb@suse.de>2006-10-03 01:15:46 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:17 -0700
commit850b2b420cd5b363ed4cf48a8816d656c8b5251b (patch)
treeb63aa37b3fb7dfb7a0b674d5a2ebe9da13cc7405 /include
parent[PATCH] md: factor out part of raid10d into a separate function. (diff)
downloadlinux-dev-850b2b420cd5b363ed4cf48a8816d656c8b5251b.tar.xz
linux-dev-850b2b420cd5b363ed4cf48a8816d656c8b5251b.zip
[PATCH] md: replace magic numbers in sb_dirty with well defined bit flags
Instead of magic numbers (0,1,2,3) in sb_dirty, we have some flags instead: MD_CHANGE_DEVS Some device state has changed requiring superblock update on all devices. MD_CHANGE_CLEAN The array has transitions from 'clean' to 'dirty' or back, requiring a superblock update on active devices, but possibly not on spares MD_CHANGE_PENDING A superblock update is underway. We wait for an update to complete by waiting for all flags to be clear. A flag can be set at any time, even during an update, without risk that the change will be lost. Stop exporting md_update_sb - isn't needed. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/raid/md.h1
-rw-r--r--include/linux/raid/md_k.h6
2 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index c588709acbbc..866a1e2b0ce0 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -95,7 +95,6 @@ extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
extern void md_do_sync(mddev_t *mddev);
extern void md_new_event(mddev_t *mddev);
-extern void md_update_sb(mddev_t * mddev);
#endif /* CONFIG_MD */
#endif
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 920b94fe31fa..e423dad1a7fd 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -116,7 +116,11 @@ struct mddev_s
dev_t unit;
int md_minor;
struct list_head disks;
- int sb_dirty;
+ unsigned long flags;
+#define MD_CHANGE_DEVS 0 /* Some device status has changed */
+#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
+#define MD_CHANGE_PENDING 2 /* superblock update in progress */
+
int ro;
struct gendisk *gendisk;