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-rw-r--r--fs/nilfs2/the_nilfs.c4
-rw-r--r--include/linux/nilfs2_fs.h1
2 files changed, 3 insertions, 2 deletions
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index ba7c10c..461b721 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -468,8 +468,8 @@ static unsigned long long nilfs_max_size(unsigned int blkbits)
static int nilfs_store_disk_layout(struct the_nilfs *nilfs,
struct nilfs_super_block *sbp)
{
- if (le32_to_cpu(sbp->s_rev_level) != NILFS_CURRENT_REV) {
- printk(KERN_ERR "NILFS: revision mismatch "
+ if (le32_to_cpu(sbp->s_rev_level) < NILFS_MIN_SUPP_REV) {
+ printk(KERN_ERR "NILFS: unsupported revision "
"(superblock rev.=%d.%d, current rev.=%d.%d). "
"Please check the version of mkfs.nilfs.\n",
le32_to_cpu(sbp->s_rev_level),
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index f5487b6..b07f5cd 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -229,6 +229,7 @@ struct nilfs_super_block {
*/
#define NILFS_CURRENT_REV 2 /* current major revision */
#define NILFS_MINOR_REV 0 /* minor revision */
+#define NILFS_MIN_SUPP_REV 2 /* minimum supported revision */
/*
* Feature set definitions
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