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authorNick Piggin <npiggin@kernel.dk>2011-01-07 09:49:33 +0300
committerNick Piggin <npiggin@kernel.dk>2011-01-07 09:50:21 +0300
commitda5029563a0a026c64821b09e8e7b4fd81d3fe1b (patch)
tree5d5618e0cb382390073377b1be7d0aa76879ac54 /drivers
parentb7ab39f631f505edc2bbdb86620d5493f995c9da (diff)
downloadlinux-da5029563a0a026c64821b09e8e7b4fd81d3fe1b.tar.xz
fs: dcache scale d_unhashed
Protect d_unhashed(dentry) condition with d_lock. This means keeping DCACHE_UNHASHED bit in synch with hash manipulations. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/core/inode.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index b690aa35df9a..e3ab4437ea96 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -347,10 +347,13 @@ static int usbfs_empty (struct dentry *dentry)
list_for_each(list, &dentry->d_subdirs) {
struct dentry *de = list_entry(list, struct dentry, d_u.d_child);
+ spin_lock(&de->d_lock);
if (usbfs_positive(de)) {
+ spin_unlock(&de->d_lock);
spin_unlock(&dcache_lock);
return 0;
}
+ spin_unlock(&de->d_lock);
}
spin_unlock(&dcache_lock);