linux-kernel - [PATCH] logfs: kill BKL

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Date:	Tue, 27 Apr 2010 22:30:06 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Frederic Weisbecker <fweisbec@...il.com>,
	Jörn Engel <joern@...fs.org>
Cc:	John Kacur <jkacur@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Jan Blunck <jblunck@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] logfs: kill BKL

logfs does not need the BKL, so use ->unlocked_ioctl instead
of ->ioctl in file operations.
---
On Tuesday 27 April 2010 22:12:52 Frederic Weisbecker wrote:
> 
> I've applied this series in bkl/ioctl, it passed allyesconfig in sparc.
> I will apply the others from you and John tomorrow or so (and will enjoy
> my part as well). Jörn, please queue this patch if you want to, as you prefer,
> we can host it as well if necessary.

I believe that this is the one that Jörn would prefer to go in. I hope I
got it right by editing the patch.

diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 2396a85..a801b5e 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -821,7 +821,7 @@ const struct inode_operations logfs_dir_iops = {
 };
 const struct file_operations logfs_dir_fops = {
 	.fsync		= logfs_fsync,
-	.ioctl		= logfs_ioctl,
+	.unlocked_ioctl	= logfs_ioctl,
 	.readdir	= logfs_readdir,
 	.read		= generic_read_dir,
 };
diff --git a/fs/logfs/file.c b/fs/logfs/file.c
index 370f367..1dbc342 100644
--- a/fs/logfs/file.c
+++ b/fs/logfs/file.c
@@ -171,9 +172,9 @@ static int logfs_releasepage(struct page *page, gfp_t only_xfs_uses_this)
 }
 
 
-int logfs_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-		unsigned long arg)
+long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
+	struct inode *inode = file->f_path.dentry->d_inode;
 	struct logfs_inode *li = logfs_inode(inode);
 	unsigned int oldflags, flags;
 	int err;
@@ -243,7 +255,7 @@ const struct file_operations logfs_reg_fops = {
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= generic_file_aio_write,
 	.fsync		= logfs_fsync,
-	.ioctl		= logfs_ioctl,
+	.unlocked_ioctl	= logfs_ioctl,
 	.llseek		= generic_file_llseek,
 	.mmap		= generic_file_readonly_mmap,
 	.open		= generic_file_open,
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 0a3df1a..8432c51 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -501,8 +501,8 @@ extern const struct inode_operations logfs_reg_iops;
 extern const struct file_operations logfs_reg_fops;
 extern const struct address_space_operations logfs_reg_aops;
 int logfs_readpage(struct file *file, struct page *page);
-int logfs_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-		unsigned long arg);
+long logfs_ioctl(struct file *file, unsigned int cmd,
+		 unsigned long arg);
 int logfs_fsync(struct file *file, struct dentry *dentry, int datasync);
 
 /* gc.c */
--
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