From: Christoph Hellwig <hch@lst.de>
To: Christian Brauner <brauner@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Cc: Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
Tejun Heo <tj@kernel.org>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Anna Schumaker <anna@kernel.org>,
Kees Cook <keescook@chromium.org>,
Damien Le Moal <dlemoal@kernel.org>,
Naohiro Aota <naohiro.aota@wdc.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-hardening@vger.kernel.org,
cgroups@vger.kernel.org
Subject: [PATCH 10/19] USB: gadget/legacy: remove sb_mutex
Date: Wed, 13 Sep 2023 08:10:04 -0300 [thread overview]
Message-ID: <20230913111013.77623-11-hch@lst.de> (raw)
In-Reply-To: <20230913111013.77623-1-hch@lst.de>
Creating new a new super_block vs freeing the old one for single instance
file systems is serialized by the wait for SB_DEAD.
Remove the superfluous sb_mutex.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/usb/gadget/legacy/inode.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index ce9e31f3d26bcc..a203266bc0dc82 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -229,7 +229,6 @@ static void put_ep (struct ep_data *data)
*/
static const char *CHIP;
-static DEFINE_MUTEX(sb_mutex); /* Serialize superblock operations */
/*----------------------------------------------------------------------*/
@@ -2012,8 +2011,6 @@ gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
struct dev_data *dev;
int rc;
- mutex_lock(&sb_mutex);
-
if (the_device) {
rc = -ESRCH;
goto Done;
@@ -2069,7 +2066,6 @@ gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
rc = -ENOMEM;
Done:
- mutex_unlock(&sb_mutex);
return rc;
}
@@ -2092,7 +2088,6 @@ static int gadgetfs_init_fs_context(struct fs_context *fc)
static void
gadgetfs_kill_sb (struct super_block *sb)
{
- mutex_lock(&sb_mutex);
kill_litter_super (sb);
if (the_device) {
put_dev (the_device);
@@ -2100,7 +2095,6 @@ gadgetfs_kill_sb (struct super_block *sb)
}
kfree(CHIP);
CHIP = NULL;
- mutex_unlock(&sb_mutex);
}
/*----------------------------------------------------------------------*/
--
2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Christian Brauner
<brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
Cc: Heiko Carstens <hca-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Vasily Gorbik <gor-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Alexander Gordeev
<agordeev-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Fenghua Yu <fenghua.yu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Reinette Chatre
<reinette.chatre-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Miquel Raynal
<miquel.raynal-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org>,
Richard Weinberger <richard-/L3Ra7n9ekc@public.gmane.org>,
Vignesh Raghavendra <vigneshr-l0cyMroinI0@public.gmane.org>,
Dennis Dalessandro
<dennis.dalessandro-ntyVByD3zXaTtA8H5PvdGFaTQe2KTcn/@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Trond Myklebust
<trond.myklebust-F/q8l9xzQnoyLce1RVWEUA@public.gmane.org>,
Anna Schumaker <anna-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Damien Le Moal <dlemoal-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Naohiro Aota <naohiro.aota-Sjgp3cTcYWE@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 10/19] USB: gadget/legacy: remove sb_mutex
Date: Wed, 13 Sep 2023 08:10:04 -0300 [thread overview]
Message-ID: <20230913111013.77623-11-hch@lst.de> (raw)
In-Reply-To: <20230913111013.77623-1-hch-jcswGhMUV9g@public.gmane.org>
Creating new a new super_block vs freeing the old one for single instance
file systems is serialized by the wait for SB_DEAD.
Remove the superfluous sb_mutex.
Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
---
drivers/usb/gadget/legacy/inode.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index ce9e31f3d26bcc..a203266bc0dc82 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -229,7 +229,6 @@ static void put_ep (struct ep_data *data)
*/
static const char *CHIP;
-static DEFINE_MUTEX(sb_mutex); /* Serialize superblock operations */
/*----------------------------------------------------------------------*/
@@ -2012,8 +2011,6 @@ gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
struct dev_data *dev;
int rc;
- mutex_lock(&sb_mutex);
-
if (the_device) {
rc = -ESRCH;
goto Done;
@@ -2069,7 +2066,6 @@ gadgetfs_fill_super (struct super_block *sb, struct fs_context *fc)
rc = -ENOMEM;
Done:
- mutex_unlock(&sb_mutex);
return rc;
}
@@ -2092,7 +2088,6 @@ static int gadgetfs_init_fs_context(struct fs_context *fc)
static void
gadgetfs_kill_sb (struct super_block *sb)
{
- mutex_lock(&sb_mutex);
kill_litter_super (sb);
if (the_device) {
put_dev (the_device);
@@ -2100,7 +2095,6 @@ gadgetfs_kill_sb (struct super_block *sb)
}
kfree(CHIP);
CHIP = NULL;
- mutex_unlock(&sb_mutex);
}
/*----------------------------------------------------------------------*/
--
2.39.2
next prev parent reply other threads:[~2023-09-13 11:11 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 11:09 split up ->kill_sb Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-13 11:09 ` [PATCH 01/19] fs: reflow deactivate_locked_super Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-13 16:35 ` Christian Brauner
2023-09-13 16:35 ` Christian Brauner
2023-09-26 9:24 ` Christoph Hellwig
2023-09-26 9:24 ` Christoph Hellwig
2023-09-13 11:09 ` [PATCH 02/19] fs: make ->kill_sb optional Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-13 11:09 ` [PATCH 03/19] fs: release anon dev_t in deactivate_locked_super Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-13 23:27 ` Al Viro
2023-09-13 23:27 ` Al Viro
2023-09-14 2:37 ` Al Viro
2023-09-14 2:37 ` Al Viro
2023-09-14 5:38 ` Al Viro
2023-09-14 5:38 ` Al Viro
2023-09-14 7:56 ` Christian Brauner
2023-09-14 7:56 ` Christian Brauner
2023-09-26 9:31 ` Christoph Hellwig
2023-09-26 9:31 ` Christoph Hellwig
2023-09-14 14:02 ` Christian Brauner
2023-09-14 14:02 ` Christian Brauner
2023-09-14 16:58 ` Al Viro
2023-09-14 16:58 ` Al Viro
2023-09-14 19:23 ` Al Viro
2023-09-14 19:23 ` Al Viro
2023-09-15 7:40 ` Christian Brauner
2023-09-15 7:40 ` Christian Brauner
2023-09-15 9:44 ` Christian Brauner
2023-09-15 9:44 ` Christian Brauner
2023-09-15 14:12 ` Christian Brauner
2023-09-15 14:12 ` Christian Brauner
2023-09-15 14:28 ` Al Viro
2023-09-15 14:28 ` Al Viro
2023-09-15 14:33 ` Al Viro
2023-09-15 14:33 ` Al Viro
2023-09-15 14:40 ` Christian Brauner
2023-09-15 14:40 ` Christian Brauner
2023-09-26 9:41 ` Christoph Hellwig
2023-09-26 9:41 ` Christoph Hellwig
2023-09-26 9:38 ` Christoph Hellwig
2023-09-26 9:38 ` Christoph Hellwig
2023-09-26 21:25 ` Al Viro
2023-09-27 22:29 ` Al Viro
2023-10-02 6:46 ` Christoph Hellwig
2023-10-09 21:57 ` Al Viro
2023-10-10 8:44 ` Christian Brauner
2023-10-17 19:50 ` Al Viro
2023-09-13 11:09 ` [PATCH 04/19] NFS: remove the s_dev field from struct nfs_server Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-13 11:09 ` [PATCH 05/19] fs: assign an anon dev_t in common code Christoph Hellwig
2023-09-13 11:09 ` Christoph Hellwig
2023-09-14 0:34 ` Al Viro
2023-09-14 0:34 ` Al Viro
2023-09-13 11:10 ` [PATCH 06/19] qibfs: use simple_release_fs Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-18 11:41 ` Leon Romanovsky
2023-09-18 11:41 ` Leon Romanovsky
2023-09-13 11:10 ` [PATCH 07/19] hypfs: use d_genocide to kill fs entries Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 11:10 ` [PATCH 08/19] pstore: shrink the pstore_sb_lock critical section in pstore_kill_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 22:07 ` Kees Cook
2023-09-13 22:07 ` Kees Cook
2023-09-13 11:10 ` [PATCH 09/19] zonefs: remove duplicate cleanup in zonefs_fill_super Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-14 0:33 ` Damien Le Moal
2023-09-14 0:33 ` Damien Le Moal
2023-09-14 0:49 ` Al Viro
2023-09-14 0:49 ` Al Viro
2023-09-13 11:10 ` Christoph Hellwig [this message]
2023-09-13 11:10 ` [PATCH 10/19] USB: gadget/legacy: remove sb_mutex Christoph Hellwig
2023-09-13 16:10 ` Alan Stern
2023-09-13 16:10 ` Alan Stern
2023-09-26 9:24 ` Christoph Hellwig
2023-09-26 9:24 ` Christoph Hellwig
2023-09-14 10:22 ` Sergey Shtylyov
2023-09-14 10:22 ` Sergey Shtylyov
2023-09-13 11:10 ` [PATCH 11/19] fs: add new shutdown_sb and free_sb methods Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-14 2:07 ` Al Viro
2023-09-14 2:07 ` Al Viro
2023-09-13 11:10 ` [PATCH 12/19] fs: convert kill_litter_super to litter_shutdown_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 22:07 ` Kees Cook
2023-09-13 22:07 ` Kees Cook
2023-09-13 11:10 ` [PATCH 13/19] fs: convert kill_block_super to block_free_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-14 2:29 ` Al Viro
2023-09-14 2:29 ` Al Viro
2023-09-13 11:10 ` [PATCH 14/19] jffs2: convert to ->shutdown_sb and ->free_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 11:10 ` [PATCH 15/19] kernfs: split ->kill_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-18 15:24 ` Michal Koutný
2023-09-18 15:24 ` Michal Koutný
2023-09-13 11:10 ` [PATCH 16/19] x86/resctrl: release rdtgroup_mutex and the CPU hotplug lock in rdt_shutdown_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 11:10 ` [PATCH 17/19] NFS: move nfs_kill_super to fs_context.c Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 11:10 ` [PATCH 18/19] fs: simple ->shutdown_sb and ->free_sb conversions Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
2023-09-13 11:10 ` [PATCH 19/19] fs: remove ->kill_sb Christoph Hellwig
2023-09-13 11:10 ` Christoph Hellwig
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