diff options
Diffstat (limited to 'fs/ubifs')
| -rw-r--r-- | fs/ubifs/super.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 91c91cb7a599..79fad43f3c57 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -36,6 +36,7 @@ #include <linux/mount.h> #include <linux/math64.h> #include <linux/writeback.h> +#include <linux/smp_lock.h> #include "ubifs.h" /* @@ -452,9 +453,6 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) if (!wait) return 0; - if (sb->s_flags & MS_RDONLY) - return 0; - /* * VFS calls '->sync_fs()' before synchronizing all dirty inodes and * pages, so synchronize them first, then commit the journal. Strictly @@ -1724,6 +1722,9 @@ static void ubifs_put_super(struct super_block *sb) ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num, c->vi.vol_id); + + lock_kernel(); + /* * The following asserts are only valid if there has not been a failure * of the media. For example, there will be dirty inodes if we failed @@ -1790,6 +1791,8 @@ static void ubifs_put_super(struct super_block *sb) ubi_close_volume(c->ubi); mutex_unlock(&c->umount_mutex); kfree(c); + + unlock_kernel(); } static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) @@ -1805,17 +1808,22 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) return err; } + lock_kernel(); if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { if (c->ro_media) { ubifs_msg("cannot re-mount due to prior errors"); + unlock_kernel(); return -EROFS; } err = ubifs_remount_rw(c); - if (err) + if (err) { + unlock_kernel(); return err; + } } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) { if (c->ro_media) { ubifs_msg("cannot re-mount due to prior errors"); + unlock_kernel(); return -EROFS; } ubifs_remount_ro(c); @@ -1830,6 +1838,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) } ubifs_assert(c->lst.taken_empty_lebs > 0); + unlock_kernel(); return 0; } @@ -2086,8 +2095,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags, return 0; out_deact: - up_write(&sb->s_umount); - deactivate_super(sb); + deactivate_locked_super(sb); out_close: ubi_close_volume(ubi); return err; |