* [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file
@ 2006-09-20 7:38 Hidetoshi Seto
2006-09-20 7:49 ` [PATCH 2.6.18] sysfs: update obsolete comment " Hidetoshi Seto
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Hidetoshi Seto @ 2006-09-20 7:38 UTC (permalink / raw)
To: Greg KH; +Cc: Linux Kernel list
Following function can drops d_count twice against one reference
by lookup_one_len.
<SOURCE>
/**
* sysfs_update_file - update the modified timestamp on an object attribute.
* @kobj: object we're acting for.
* @attr: attribute descriptor.
*/
int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
{
struct dentry * dir = kobj->dentry;
struct dentry * victim;
int res = -ENOENT;
mutex_lock(&dir->d_inode->i_mutex);
victim = lookup_one_len(attr->name, dir, strlen(attr->name));
if (!IS_ERR(victim)) {
/* make sure dentry is really there */
if (victim->d_inode &&
(victim->d_parent->d_inode == dir->d_inode)) {
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
/**
* Drop reference from initial sysfs_get_dentry().
*/
dput(victim);
res = 0;
} else
d_drop(victim);
/**
* Drop the reference acquired from sysfs_get_dentry() above.
*/
dput(victim);
}
mutex_unlock(&dir->d_inode->i_mutex);
return res;
}
</SOURCE>
PCI-hotplug (drivers/pci/hotplug/pci_hotplug_core.c) is only user of
this function. I confirmed that dentry of /sys/bus/pci/slots/XXX/*
have negative d_count value.
This patch removes unnecessary dput().
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
---
fs/sysfs/file.c | 5 -----
1 files changed, 5 deletions(-)
Index: linux-2.6.18/fs/sysfs/file.c
===================================================================
--- linux-2.6.18.orig/fs/sysfs/file.c
+++ linux-2.6.18/fs/sysfs/file.c
@@ -483,11 +483,6 @@
(victim->d_parent->d_inode == dir->d_inode)) {
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
-
- /**
- * Drop reference from initial sysfs_get_dentry().
- */
- dput(victim);
res = 0;
} else
d_drop(victim);
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2.6.18] sysfs: update obsolete comment in sysfs_update_file
2006-09-20 7:38 [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Hidetoshi Seto
@ 2006-09-20 7:49 ` Hidetoshi Seto
2006-09-28 7:02 ` patch sysfs-update-obsolete-comment-in-sysfs_update_file.patch added to gregkh-2.6 tree gregkh
2006-09-21 3:19 ` [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Maneesh Soni
2006-09-28 7:02 ` patch sysfs-remove-duplicated-dput-in-sysfs_update_file.patch added to gregkh-2.6 tree gregkh
2 siblings, 1 reply; 5+ messages in thread
From: Hidetoshi Seto @ 2006-09-20 7:49 UTC (permalink / raw)
To: Greg KH; +Cc: Linux Kernel list
And the obsolete comment should be updated (or totally removed).
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
---
fs/sysfs/file.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6.18/fs/sysfs/file.c
===================================================================
--- linux-2.6.18.orig/fs/sysfs/file.c
+++ linux-2.6.18/fs/sysfs/file.c
@@ -488,7 +488,7 @@
d_drop(victim);
/**
- * Drop the reference acquired from sysfs_get_dentry() above.
+ * Drop the reference acquired from lookup_one_len() above.
*/
dput(victim);
}
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file
2006-09-20 7:38 [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Hidetoshi Seto
2006-09-20 7:49 ` [PATCH 2.6.18] sysfs: update obsolete comment " Hidetoshi Seto
@ 2006-09-21 3:19 ` Maneesh Soni
2006-09-28 7:02 ` patch sysfs-remove-duplicated-dput-in-sysfs_update_file.patch added to gregkh-2.6 tree gregkh
2 siblings, 0 replies; 5+ messages in thread
From: Maneesh Soni @ 2006-09-21 3:19 UTC (permalink / raw)
To: Hidetoshi Seto; +Cc: Greg KH, Linux Kernel list
On Wed, Sep 20, 2006 at 04:38:00PM +0900, Hidetoshi Seto wrote:
> Following function can drops d_count twice against one reference
> by lookup_one_len.
>
> <SOURCE>
> /**
> * sysfs_update_file - update the modified timestamp on an object attribute.
> * @kobj: object we're acting for.
> * @attr: attribute descriptor.
> */
> int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
> {
> struct dentry * dir = kobj->dentry;
> struct dentry * victim;
> int res = -ENOENT;
>
> mutex_lock(&dir->d_inode->i_mutex);
> victim = lookup_one_len(attr->name, dir, strlen(attr->name));
> if (!IS_ERR(victim)) {
> /* make sure dentry is really there */
> if (victim->d_inode &&
> (victim->d_parent->d_inode == dir->d_inode)) {
> victim->d_inode->i_mtime = CURRENT_TIME;
> fsnotify_modify(victim);
>
> /**
> * Drop reference from initial sysfs_get_dentry().
> */
> dput(victim);
> res = 0;
> } else
> d_drop(victim);
>
> /**
> * Drop the reference acquired from sysfs_get_dentry() above.
> */
> dput(victim);
> }
> mutex_unlock(&dir->d_inode->i_mutex);
>
> return res;
> }
> </SOURCE>
>
> PCI-hotplug (drivers/pci/hotplug/pci_hotplug_core.c) is only user of
> this function. I confirmed that dentry of /sys/bus/pci/slots/XXX/*
> have negative d_count value.
>
> This patch removes unnecessary dput().
>
> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
>
> ---
> fs/sysfs/file.c | 5 -----
> 1 files changed, 5 deletions(-)
>
> Index: linux-2.6.18/fs/sysfs/file.c
> ===================================================================
> --- linux-2.6.18.orig/fs/sysfs/file.c
> +++ linux-2.6.18/fs/sysfs/file.c
> @@ -483,11 +483,6 @@
> (victim->d_parent->d_inode == dir->d_inode)) {
> victim->d_inode->i_mtime = CURRENT_TIME;
> fsnotify_modify(victim);
> -
> - /**
> - * Drop reference from initial sysfs_get_dentry().
> - */
> - dput(victim);
> res = 0;
> } else
> d_drop(victim);
>
> -
>
Looks good to me..
Thanks
Maneesh
^ permalink raw reply [flat|nested] 5+ messages in thread
* patch sysfs-remove-duplicated-dput-in-sysfs_update_file.patch added to gregkh-2.6 tree
2006-09-20 7:38 [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Hidetoshi Seto
2006-09-20 7:49 ` [PATCH 2.6.18] sysfs: update obsolete comment " Hidetoshi Seto
2006-09-21 3:19 ` [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Maneesh Soni
@ 2006-09-28 7:02 ` gregkh
2 siblings, 0 replies; 5+ messages in thread
From: gregkh @ 2006-09-28 7:02 UTC (permalink / raw)
To: seto.hidetoshi, gregkh, linux-kernel, maneesh
This is a note to let you know that I've just added the patch titled
Subject: sysfs: remove duplicated dput in sysfs_update_file
to my gregkh-2.6 tree. Its filename is
sysfs-remove-duplicated-dput-in-sysfs_update_file.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From seto.hidetoshi@jp.fujitsu.com Wed Sep 20 00:35:46 2006
Message-ID: <4510EFD8.2050608@jp.fujitsu.com>
Date: Wed, 20 Sep 2006 16:38:00 +0900
From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
To: Greg KH <gregkh@suse.de>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: sysfs: remove duplicated dput in sysfs_update_file
Following function can drops d_count twice against one reference
by lookup_one_len.
<SOURCE>
/**
* sysfs_update_file - update the modified timestamp on an object attribute.
* @kobj: object we're acting for.
* @attr: attribute descriptor.
*/
int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
{
struct dentry * dir = kobj->dentry;
struct dentry * victim;
int res = -ENOENT;
mutex_lock(&dir->d_inode->i_mutex);
victim = lookup_one_len(attr->name, dir, strlen(attr->name));
if (!IS_ERR(victim)) {
/* make sure dentry is really there */
if (victim->d_inode &&
(victim->d_parent->d_inode == dir->d_inode)) {
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
/**
* Drop reference from initial sysfs_get_dentry().
*/
dput(victim);
res = 0;
} else
d_drop(victim);
/**
* Drop the reference acquired from sysfs_get_dentry() above.
*/
dput(victim);
}
mutex_unlock(&dir->d_inode->i_mutex);
return res;
}
</SOURCE>
PCI-hotplug (drivers/pci/hotplug/pci_hotplug_core.c) is only user of
this function. I confirmed that dentry of /sys/bus/pci/slots/XXX/*
have negative d_count value.
This patch removes unnecessary dput().
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/sysfs/file.c | 5 -----
1 file changed, 5 deletions(-)
--- gregkh-2.6.orig/fs/sysfs/file.c
+++ gregkh-2.6/fs/sysfs/file.c
@@ -497,11 +497,6 @@ int sysfs_update_file(struct kobject * k
(victim->d_parent->d_inode == dir->d_inode)) {
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
-
- /**
- * Drop reference from initial sysfs_get_dentry().
- */
- dput(victim);
res = 0;
} else
d_drop(victim);
Patches currently in gregkh-2.6 which might be from seto.hidetoshi@jp.fujitsu.com are
driver/sysfs-remove-duplicated-dput-in-sysfs_update_file.patch
driver/sysfs-update-obsolete-comment-in-sysfs_update_file.patch
^ permalink raw reply [flat|nested] 5+ messages in thread
* patch sysfs-update-obsolete-comment-in-sysfs_update_file.patch added to gregkh-2.6 tree
2006-09-20 7:49 ` [PATCH 2.6.18] sysfs: update obsolete comment " Hidetoshi Seto
@ 2006-09-28 7:02 ` gregkh
0 siblings, 0 replies; 5+ messages in thread
From: gregkh @ 2006-09-28 7:02 UTC (permalink / raw)
To: seto.hidetoshi, gregkh, linux-kernel
This is a note to let you know that I've just added the patch titled
Subject: sysfs: update obsolete comment in sysfs_update_file
to my gregkh-2.6 tree. Its filename is
sysfs-update-obsolete-comment-in-sysfs_update_file.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From seto.hidetoshi@jp.fujitsu.com Wed Sep 20 00:46:42 2006
Message-ID: <4510F26E.2070706@jp.fujitsu.com>
Date: Wed, 20 Sep 2006 16:49:02 +0900
From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
To: Greg KH <gregkh@suse.de>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: sysfs: update obsolete comment in sysfs_update_file
And the obsolete comment should be updated (or totally removed).
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/sysfs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- gregkh-2.6.orig/fs/sysfs/file.c
+++ gregkh-2.6/fs/sysfs/file.c
@@ -502,7 +502,7 @@ int sysfs_update_file(struct kobject * k
d_drop(victim);
/**
- * Drop the reference acquired from sysfs_get_dentry() above.
+ * Drop the reference acquired from lookup_one_len() above.
*/
dput(victim);
}
Patches currently in gregkh-2.6 which might be from seto.hidetoshi@jp.fujitsu.com are
driver/sysfs-remove-duplicated-dput-in-sysfs_update_file.patch
driver/sysfs-update-obsolete-comment-in-sysfs_update_file.patch
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2006-09-28 7:02 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-09-20 7:38 [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Hidetoshi Seto
2006-09-20 7:49 ` [PATCH 2.6.18] sysfs: update obsolete comment " Hidetoshi Seto
2006-09-28 7:02 ` patch sysfs-update-obsolete-comment-in-sysfs_update_file.patch added to gregkh-2.6 tree gregkh
2006-09-21 3:19 ` [PATCH 2.6.18] sysfs: remove duplicated dput in sysfs_update_file Maneesh Soni
2006-09-28 7:02 ` patch sysfs-remove-duplicated-dput-in-sysfs_update_file.patch added to gregkh-2.6 tree gregkh
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