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| author | John Kacur <jkacur@redhat.com> | 2009-10-18 23:49:49 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-01-04 12:31:20 -0800 |
| commit | 6432e734c99ed685e3cad72f7dcae4c65008fcab (patch) | |
| tree | 2d654c52446e6619eed42648977aeb0181e0d98e /drivers/char | |
| parent | a87da40875f5510866a699b72818cce09b0b9040 (diff) | |
| download | kernel_samsung_smdk4412-6432e734c99ed685e3cad72f7dcae4c65008fcab.zip kernel_samsung_smdk4412-6432e734c99ed685e3cad72f7dcae4c65008fcab.tar.gz kernel_samsung_smdk4412-6432e734c99ed685e3cad72f7dcae4c65008fcab.tar.bz2 | |
sony_pi: Remove the BKL from open and ioctl
The BKL is in this function because of the BKL pushdown (see commit
f8f2c79d594463427f7114cedb1555110d547d89)
It is not needed here because the mutex_lock sonypi_device.lock provides
the necessary locking.
sonypi_misc_ioctl can be converted to unlocked ioctls since it relies on
its own locking (the mutex sonypi_device.lock) and not the bkl
Document that llseek is not needed by explictly setting it to no_llseek
LKML-Reference: <alpine.LFD.2.00.0910192019420.3563@localhost.localdomain>
Signed-off-by: John Kacur <jkacur@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/sonypi.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c index 0798754..bba727c 100644 --- a/drivers/char/sonypi.c +++ b/drivers/char/sonypi.c @@ -50,7 +50,6 @@ #include <linux/err.h> #include <linux/kfifo.h> #include <linux/platform_device.h> -#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -905,14 +904,13 @@ static int sonypi_misc_release(struct inode *inode, struct file *file) static int sonypi_misc_open(struct inode *inode, struct file *file) { - lock_kernel(); mutex_lock(&sonypi_device.lock); /* Flush input queue on first open */ if (!sonypi_device.open_count) kfifo_reset(&sonypi_device.fifo); sonypi_device.open_count++; mutex_unlock(&sonypi_device.lock); - unlock_kernel(); + return 0; } @@ -955,10 +953,10 @@ static unsigned int sonypi_misc_poll(struct file *file, poll_table *wait) return 0; } -static int sonypi_misc_ioctl(struct inode *ip, struct file *fp, +static long sonypi_misc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) { - int ret = 0; + long ret = 0; void __user *argp = (void __user *)arg; u8 val8; u16 val16; @@ -1074,7 +1072,8 @@ static const struct file_operations sonypi_misc_fops = { .open = sonypi_misc_open, .release = sonypi_misc_release, .fasync = sonypi_misc_fasync, - .ioctl = sonypi_misc_ioctl, + .unlocked_ioctl = sonypi_misc_ioctl, + .llseek = no_llseek, }; static struct miscdevice sonypi_misc_device = { |