Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ca38805945edf5d1f5444b283eed95bb954772e8
Commit:     ca38805945edf5d1f5444b283eed95bb954772e8
Parent:     c5d79adba7ced41d7ac097c2ab74759d10522dd5
Author:     NeilBrown <[EMAIL PROTECTED]>
AuthorDate: Wed Feb 6 01:39:55 2008 -0800
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Feb 6 10:41:18 2008 -0800

    md: lock address when changing attributes of component devices
    
    Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 drivers/md/md.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 7c9a87b..3975756 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2075,12 +2075,18 @@ rdev_attr_store(struct kobject *kobj, struct attribute 
*attr,
 {
        struct rdev_sysfs_entry *entry = container_of(attr, struct 
rdev_sysfs_entry, attr);
        mdk_rdev_t *rdev = container_of(kobj, mdk_rdev_t, kobj);
+       int rv;
 
        if (!entry->store)
                return -EIO;
        if (!capable(CAP_SYS_ADMIN))
                return -EACCES;
-       return entry->store(rdev, page, length);
+       rv = mddev_lock(rdev->mddev);
+       if (!rv) {
+               rv = entry->store(rdev, page, length);
+               mddev_unlock(rdev->mddev);
+       }
+       return rv;
 }
 
 static void rdev_free(struct kobject *ko)
-
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