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Subject[PATCH 6/8] Unionfs: don't bother validating inode if it has no lower branches
Date
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
fs/unionfs/debug.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/fs/unionfs/debug.c b/fs/unionfs/debug.c
index 894bf7c..0066ccd 100644
--- a/fs/unionfs/debug.c
+++ b/fs/unionfs/debug.c
@@ -49,6 +49,9 @@ void __unionfs_check_inode(const struct inode *inode,
sb = inode->i_sb;
istart = ibstart(inode);
iend = ibend(inode);
+ /* don't check inode if no lower branches */
+ if (istart < 0 && iend < 0)
+ return;
if (unlikely(istart > iend)) {
PRINT_CALLER(fname, fxn, line);
pr_debug(" Ci0: inode=%p istart/end=%d:%d\n",
@@ -221,6 +224,9 @@ check_inode:
return;
istart = ibstart(inode);
iend = ibend(inode);
+ /* don't check inode if no lower branches */
+ if (istart < 0 && iend < 0)
+ return;
BUG_ON(istart > iend);
if (unlikely((istart == -1 && iend != -1) ||
(istart != -1 && iend == -1))) {
--
1.5.2.2
-
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