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| author | Arnd Bergmann <arnd@arndb.de> | 2010-04-28 14:36:41 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-04-29 08:44:37 -0700 |
| commit | f80a0ca6ad8f2800453e819dafa09a0ed9e56850 (patch) | |
| tree | bdbffa0e212888c31e11e89dc1194935f6825085 /drivers/block | |
| parent | a36fed12a4d980eebb2e67b87ea30ad090238cff (diff) | |
| download | linux-f80a0ca6ad8f2800453e819dafa09a0ed9e56850.tar.gz linux-f80a0ca6ad8f2800453e819dafa09a0ed9e56850.tar.bz2 linux-f80a0ca6ad8f2800453e819dafa09a0ed9e56850.zip | |
pktcdvd: improve BKL and compat_ioctl.c usage
The pktcdvd driver uses proper locking and does not need the BKL in the
ioctl and llseek functions of the character device, so kill both.
Moving the compat_ioctl handling from common code into the driver itself
fixes build problems when CONFIG_BLOCK is disabled.
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/pktcdvd.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index ddf19425245d..8a549db2aa78 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -48,6 +48,7 @@ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> +#include <linux/compat.h> #include <linux/kthread.h> #include <linux/errno.h> #include <linux/spinlock.h> @@ -2984,7 +2985,7 @@ static void pkt_get_status(struct pkt_ctrl_command *ctrl_cmd) mutex_unlock(&ctl_mutex); } -static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +static long pkt_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { void __user *argp = (void __user *)arg; struct pkt_ctrl_command ctrl_cmd; @@ -3021,10 +3022,20 @@ static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cm return ret; } +#ifdef CONFIG_COMPAT +static long pkt_ctl_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + return pkt_ctl_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); +} +#endif static const struct file_operations pkt_ctl_fops = { - .ioctl = pkt_ctl_ioctl, - .owner = THIS_MODULE, + .open = nonseekable_open, + .unlocked_ioctl = pkt_ctl_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = pkt_ctl_compat_ioctl, +#endif + .owner = THIS_MODULE, }; static struct miscdevice pkt_misc = { |