Our code is not ready to cope with a sectorsize that's not equal to PAGE_SIZE.
It will lead to hanging-on while writing something.

Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
---
 fs/btrfs/disk-io.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 20196f4..b9866f2 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2254,9 +2254,9 @@ int open_ctree(struct super_block *sb,
                goto fail_sb_buffer;
        }
 
-       if (sectorsize < PAGE_SIZE) {
-               printk(KERN_WARNING "btrfs: Incompatible sector size "
-                      "found on %s\n", sb->s_id);
+       if (sectorsize != PAGE_SIZE) {
+               printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) "
+                      "found on %s\n", (unsigned long)sectorsize, sb->s_id);
                goto fail_sb_buffer;
        }
 
-- 
1.6.5.2

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