From: Jan Harkes <jaharkes@cs.cmu.edu>
Date: Thu, 19 Jul 2007 08:48:42 +0000 (-0700)
Subject: coda: correctly invalidate cached access rights
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=56ee3547940f895a2cf20f2ac462fbeaee55fa2a;p=linux-beck.git

coda: correctly invalidate cached access rights

Change the epoch value to forces a refresh instead of clearing the cached
rights mask and block all further accesses to the object.

Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index fcb88fa8d2f2..11538a2b5423 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -43,7 +43,7 @@ void coda_cache_enter(struct inode *inode, int mask)
 void coda_cache_clear_inode(struct inode *inode)
 {
 	struct coda_inode_info *cii = ITOC(inode);
-        cii->c_cached_perm = 0;
+	cii->c_cached_epoch = atomic_read(&permission_epoch) - 1;
 }
 
 /* remove all acl caches */