[PATCH] md: a couple of tidyups relating to the bitmap file.

1/ When init from disk, it is a BUG if there is nowhere
   to init from,
2/ use seq_path to print path in /proc/mdstat

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index c402f6cc7047..52fafb820f74 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3213,10 +3213,8 @@ static int md_seq_show(struct seq_file *seq, void *v)
                         seq_printf(seq, "\n       ");
 
                 if ((bitmap = mddev->bitmap)) {
-                        char *buf, *path;
                         unsigned long chunk_kb;
                         unsigned long flags;
-                        buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
                         spin_lock_irqsave(&bitmap->lock, flags);
                         chunk_kb = bitmap->chunksize >> 10;
                         seq_printf(seq, "bitmap: %lu/%lu pages [%luKB], "
@@ -3227,13 +3225,14 @@ static int md_seq_show(struct seq_file *seq, void *v)
                                         << (PAGE_SHIFT - 10),
                                 chunk_kb ? chunk_kb : bitmap->chunksize,
                                 chunk_kb ? "KB" : "B");
-                        if (bitmap->file && buf) {
-                                path = file_path(bitmap->file, buf, PAGE_SIZE);
-                                seq_printf(seq, ", file: %s", path ? path : "");
+                        if (bitmap->file) {
+                                seq_printf(seq, ", file: ");
+                                seq_path(seq, bitmap->file->f_vfsmnt,
+                                         bitmap->file->f_dentry," \t\n");
                         }
+
                         seq_printf(seq, "\n");
                         spin_unlock_irqrestore(&bitmap->lock, flags);
-                        kfree(buf);
                 }
 
                 seq_printf(seq, "\n");