commit de65962d2718add72ae2a498a9dc4f4c8a0ebddd
Author: Erez_Zadok <[EMAIL PROTECTED]>
Date: Mon Jul 16 23:40:07 2007 -0400
Unionfs: debugging: don't oops if sb->s_root is NULL
If we're calling show_branch_counts very early during mount or late during
unmount, don't oops if the s_root is already NULL.
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
diff --git a/fs/unionfs/debug.c b/fs/unionfs/debug.c
index 424c60d..94f0e84 100644
--- a/fs/unionfs/debug.c
+++ b/fs/unionfs/debug.c
@@ -416,7 +416,10 @@ void __show_branch_counts(const struct super_block *sb,
printk("BC:");
for (i=0; i<sbmax(sb); i++) {
- mnt = UNIONFS_D(sb->s_root)->lower_paths[i].mnt;
+ if (sb->s_root)
+ mnt = UNIONFS_D(sb->s_root)->lower_paths[i].mnt;
+ else
+ mnt = NULL;
printk("%d:", (mnt ? atomic_read(&mnt->mnt_count) : -99));
}
printk("%s:%s:%d\n",file,fxn,line);
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