compat_ioctl: move WDIOC handling into wdt drivers
All watchdog drivers implement the same set of ioctl commands, and
fortunately all of them are compatible between 32-bit and 64-bit
architectures.
Modern drivers always go through drivers/watchdog/wdt.c as an abstraction
layer, but older ones implement their own file_operations on a character
device for this.
Move the handling from fs/compat_ioctl.c into the individual drivers.
Note that most of the legacy drivers will never be used on 64-bit
hardware, because they are for an old 32-bit SoC implementation, but
doing them all at once is safer than trying to guess which ones do
or do not need the compat_ioctl handling.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/watchdog/ibmasr.c b/drivers/watchdog/ibmasr.c
index 897f7ed..4a22fe15 100644
--- a/drivers/watchdog/ibmasr.c
+++ b/drivers/watchdog/ibmasr.c
@@ -344,6 +344,7 @@ static const struct file_operations asr_fops = {
.llseek = no_llseek,
.write = asr_write,
.unlocked_ioctl = asr_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
.open = asr_open,
.release = asr_release,
};