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fs: dcache scale d_unhashed

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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>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:33 +11:00
parent b7ab39f631
commit da5029563a
10 changed files with 102 additions and 54 deletions
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2
fs/configfs/configfs_internal.h
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@@ -121,6 +121,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
struct config_item * item = NULL;
spin_lock(&dcache_lock);
spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry)) {
struct configfs_dirent * sd = dentry->d_fsdata;
if (sd->s_type & CONFIGFS_ITEM_LINK) {
@@ -129,6 +130,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
} else
item = config_item_get(sd->s_element);
}
spin_unlock(&dentry->d_lock);
spin_unlock(&dcache_lock);
return item;