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authorArnd Bergmann <arnd@arndb.de>2010-09-14 23:00:34 +0200
committerArnd Bergmann <arnd@arndb.de>2010-10-04 21:10:46 +0200
commit00e300e1b682ea86fcb5216250722afd42686ab3 (patch)
treeac3c5a6034aa669993487163eef4f757d2f803af /fs/autofs4/root.c
parent4f819a7899b06afcd7623ab9d00fd81503ad3e24 (diff)
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BKL: Remove BKL from autofs4
autofs4 uses the BKL only to guard its ioctl operations. This can be trivially converted to use a mutex, as we have done with most device drivers before. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ian Kent <raven@themaw.net>
Diffstat (limited to 'fs/autofs4/root.c')
-rw-r--r--fs/autofs4/root.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index cb1bd38dc08c..9dd29c29fd12 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -19,7 +19,7 @@
#include <linux/param.h>
#include <linux/time.h>
#include <linux/compat.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include "autofs_i.h"
@@ -978,15 +978,17 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp,
}
}
+static DEFINE_MUTEX(autofs4_ioctl_mutex);
+
static long autofs4_root_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
long ret;
struct inode *inode = filp->f_dentry->d_inode;
- lock_kernel();
+ mutex_lock(&autofs4_ioctl_mutex);
ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
- unlock_kernel();
+ mutex_unlock(&autofs4_ioctl_mutex);
return ret;
}
@@ -998,13 +1000,13 @@ static long autofs4_root_compat_ioctl(struct file *filp,
struct inode *inode = filp->f_path.dentry->d_inode;
int ret;
- lock_kernel();
+ mutex_lock(&autofs4_ioctl_mutex);
if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);
else
ret = autofs4_root_ioctl_unlocked(inode, filp, cmd,
(unsigned long)compat_ptr(arg));
- unlock_kernel();
+ mutex_unlock(&autofs4_ioctl_mutex);
return ret;
}