From: Jean Delvare Date: Wed, 12 Jan 2011 20:55:11 +0000 (+0100) Subject: hwmon: (w83793) Drop useless mutex X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=36c7fe133e29a0b2558edaef18b2401e99765417;p=linux-beck.git hwmon: (w83793) Drop useless mutex This is the same case as fschmd, from which the code was copied as far as I can see. So the same clean-up applies: The WDIOC_GETSUPPORT ioctl only needs a mutex because it operates on a static variable. There is no good reason to keep this variable static, so let's just make it non-static and drop the now useless mutex altogether. See the discussion at: http://marc.info/?l=lm-sensors&m=125563869402323&w=2 Signed-off-by: Jean Delvare Cc: Hans de Goede Acked-by: Guenter Roeck Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner --- diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c index d0c30124c13b..e3bdedfb5347 100644 --- a/drivers/hwmon/w83793.c +++ b/drivers/hwmon/w83793.c @@ -51,7 +51,6 @@ #define WATCHDOG_TIMEOUT 2 /* 2 minute default timeout */ /* Addresses to scan */ -static DEFINE_MUTEX(watchdog_mutex); static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; @@ -1350,7 +1349,7 @@ static ssize_t watchdog_write(struct file *filp, const char __user *buf, static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - static struct watchdog_info ident = { + struct watchdog_info ident = { .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_CARDRESET, @@ -1360,7 +1359,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, int val, ret = 0; struct w83793_data *data = filp->private_data; - mutex_lock(&watchdog_mutex); switch (cmd) { case WDIOC_GETSUPPORT: if (!nowayout) @@ -1414,7 +1412,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, default: ret = -ENOTTY; } - mutex_unlock(&watchdog_mutex); return ret; }