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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-08-21 17:27:29 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-08-21 17:27:29 +0200 |
| commit | e9dc122166b8d863d3057a66ada04838e5548e52 (patch) | |
| tree | 749e15bf719b64bf9113db7acd8e043d9742cb26 /drivers/md/md.h | |
| parent | sunrpc: fix memory leak in unix_gid cache. (diff) | |
| parent | SUNRPC: Ensure that sunrpc gets initialised before nfs, lockd, etc... (diff) | |
| download | linux-e9dc122166b8d863d3057a66ada04838e5548e52.tar.xz linux-e9dc122166b8d863d3057a66ada04838e5548e52.zip | |
Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming
Conflicts:
net/sunrpc/cache.c
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index 9430a110db93..f8fc188bc762 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -223,6 +223,16 @@ struct mddev_s * so we don't loop trying */ int in_sync; /* know to not need resync */ + /* 'open_mutex' avoids races between 'md_open' and 'do_md_stop', so + * that we are never stopping an array while it is open. + * 'reconfig_mutex' protects all other reconfiguration. + * These locks are separate due to conflicting interactions + * with bdev->bd_mutex. + * Lock ordering is: + * reconfig_mutex -> bd_mutex : e.g. do_md_run -> revalidate_disk + * bd_mutex -> open_mutex: e.g. __blkdev_get -> md_open + */ + struct mutex open_mutex; struct mutex reconfig_mutex; atomic_t active; /* general refcount */ atomic_t openers; /* number of active opens */ @@ -431,5 +441,7 @@ extern int md_allow_write(mddev_t *mddev); extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev); extern void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors); extern int md_check_no_bitmap(mddev_t *mddev); +extern int md_integrity_register(mddev_t *mddev); +void md_integrity_add_rdev(mdk_rdev_t *rdev, mddev_t *mddev); #endif /* _MD_MD_H */ |