From 5ff5afffe6527543866a47ffab12769427283917 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 1 Jun 2010 19:37:32 +1000 Subject: [PATCH] md/bitmap: reduce dependence on sysfs. For dm-raid45 we will want to use bitmaps in dm-targets which don't have entries in sysfs, so cope with the mddev not living in sysfs. Signed-off-by: NeilBrown --- drivers/md/bitmap.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 67fb32d1124..8af4d655b2d 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1358,7 +1358,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto bitmap->events_cleared < bitmap->mddev->events) { bitmap->events_cleared = bitmap->mddev->events; bitmap->need_sync = 1; - sysfs_notify_dirent(bitmap->sysfs_can_clear); + sysfs_notify_dirent_safe(bitmap->sysfs_can_clear); } if (!success && ! (*bmc & NEEDED_MASK)) @@ -1643,7 +1643,7 @@ int bitmap_create(mddev_t *mddev) struct file *file = mddev->bitmap_info.file; int err; sector_t start; - struct sysfs_dirent *bm; + struct sysfs_dirent *bm = NULL; BUILD_BUG_ON(sizeof(bitmap_super_t) != 256); @@ -1664,7 +1664,8 @@ int bitmap_create(mddev_t *mddev) bitmap->mddev = mddev; - bm = sysfs_get_dirent(mddev->kobj.sd, NULL, "bitmap"); + if (mddev->kobj.sd) + bm = sysfs_get_dirent(mddev->kobj.sd, NULL, "bitmap"); if (bm) { bitmap->sysfs_can_clear = sysfs_get_dirent(bm, NULL, "can_clear"); sysfs_put(bm); -- 2.20.1