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fs: change d_hash for rcu-walk

Browse source 
Change d_hash so it may be called from lock-free RCU lookups. See similar
patch for d_compare for details.

For in-tree filesystems, this is just a mechanical change.

Signed-off-by: Nick Piggin <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:49:28 +11:00
commit b1e6a015a5
25 changed files with 94 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

20
fs/affs/namei.c
View file

@ -13,13 +13,15 @@
typedef int (*toupper_t)(int);
static int affs_toupper(int ch);
static int affs_hash_dentry(struct dentry *, struct qstr *);
static int affs_hash_dentry(const struct dentry *,
const struct inode *, struct qstr *);
static int affs_compare_dentry(const struct dentry *parent,
const struct inode *pinode,
const struct dentry *dentry, const struct inode *inode,
unsigned int len, const char *str, const struct qstr *name);
static int affs_intl_toupper(int ch);
static int affs_intl_hash_dentry(struct dentry *, struct qstr *);
static int affs_intl_hash_dentry(const struct dentry *,
const struct inode *, struct qstr *);
static int affs_intl_compare_dentry(const struct dentry *parent,
const struct inode *pinode,
const struct dentry *dentry, const struct inode *inode,
@ -64,13 +66,13 @@ affs_get_toupper(struct super_block *sb)
* Note: the dentry argument is the parent dentry.
*/
static inline int
__affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper)
__affs_hash_dentry(struct qstr *qstr, toupper_t toupper)
{
const u8 *name = qstr->name;
unsigned long hash;
int i;
i = affs_check_name(qstr->name,qstr->len);
i = affs_check_name(qstr->name, qstr->len);
if (i)
return i;
@ -84,14 +86,16 @@ __affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper)
}
static int
affs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
affs_hash_dentry(const struct dentry *dentry, const struct inode *inode,
struct qstr *qstr)
{
return __affs_hash_dentry(dentry, qstr, affs_toupper);
return __affs_hash_dentry(qstr, affs_toupper);
}
static int
affs_intl_hash_dentry(struct dentry *dentry, struct qstr *qstr)
affs_intl_hash_dentry(const struct dentry *dentry, const struct inode *inode,
struct qstr *qstr)
{
return __affs_hash_dentry(dentry, qstr, affs_intl_toupper);
return __affs_hash_dentry(qstr, affs_intl_toupper);
}
static inline int __affs_compare_dentry(unsigned int len,