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Kirill Smelkov
linux
Commits
634095da
Commit
634095da
authored
Feb 27, 2013
by
Al Viro
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Plain Diff
9p: don't bother with private lock in ->d_fsdata; dentry->d_lock will do just fine
Signed-off-by:
Al Viro
<
viro@zeniv.linux.org.uk
>
parent
6131ffaa
Changes
2
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2 changed files
with
6 additions
and
7 deletions
+6
-7
fs/9p/fid.c
fs/9p/fid.c
+4
-5
fs/9p/fid.h
fs/9p/fid.h
+2
-2
No files found.
fs/9p/fid.c
View file @
634095da
...
...
@@ -54,14 +54,13 @@ int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
if
(
!
dent
)
return
-
ENOMEM
;
spin_lock_init
(
&
dent
->
lock
);
INIT_LIST_HEAD
(
&
dent
->
fidlist
);
dentry
->
d_fsdata
=
dent
;
}
spin_lock
(
&
dent
->
lock
);
spin_lock
(
&
dent
ry
->
d_
lock
);
list_add
(
&
fid
->
dlist
,
&
dent
->
fidlist
);
spin_unlock
(
&
dent
->
lock
);
spin_unlock
(
&
dent
ry
->
d_
lock
);
return
0
;
}
...
...
@@ -85,14 +84,14 @@ static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
dent
=
(
struct
v9fs_dentry
*
)
dentry
->
d_fsdata
;
ret
=
NULL
;
if
(
dent
)
{
spin_lock
(
&
dent
->
lock
);
spin_lock
(
&
dent
ry
->
d_
lock
);
list_for_each_entry
(
fid
,
&
dent
->
fidlist
,
dlist
)
{
if
(
any
||
uid_eq
(
fid
->
uid
,
uid
))
{
ret
=
fid
;
break
;
}
}
spin_unlock
(
&
dent
->
lock
);
spin_unlock
(
&
dent
ry
->
d_
lock
);
}
return
ret
;
...
...
fs/9p/fid.h
View file @
634095da
...
...
@@ -25,7 +25,6 @@
/**
* struct v9fs_dentry - 9p private data stored in dentry d_fsdata
* @lock: protects the fidlist
* @fidlist: list of FIDs currently associated with this dentry
*
* This structure defines the 9p private data associated with
...
...
@@ -35,11 +34,12 @@
* inodes in order to more closely map functionality to the Plan 9
* expected behavior for FID reclaimation and tracking.
*
* Protected by ->d_lock of dentry it belongs to.
*
* See Also: Mapping FIDs to Linux VFS model in
* Design and Implementation of the Linux 9P File System documentation
*/
struct
v9fs_dentry
{
spinlock_t
lock
;
/* protect fidlist */
struct
list_head
fidlist
;
};
...
...
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