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watchdog: cpwd: fix build regression 

The compat_ptr_ioctl() infrastructure did not make it into
linux-5.4, so cpwd now fails to build.

Fix it by using an open-coded version.

Fixes: 68f28b01fb ("watchdog: cpwd: use generic compat_ptr_ioctl")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Arnd Bergmann 2019-10-08 09:36:16 +02:00 committed by Wim Van Sebroeck
parent a99d8080aa
commit c58e81341a
1 changed files with 7 additions and 1 deletions
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8
drivers/watchdog/cpwd.c
View File

@ -26,6 +26,7 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/timer.h>
#include <linux/compat.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/io.h>
@ -473,6 +474,11 @@ static long cpwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return 0;
}
static long cpwd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
return cpwd_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
}
static ssize_t cpwd_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
@ -497,7 +503,7 @@ static ssize_t cpwd_read(struct file *file, char __user *buffer,
static const struct file_operations cpwd_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = cpwd_ioctl,
.compat_ioctl = compat_ptr_ioctl,
.compat_ioctl = cpwd_compat_ioctl,
.open = cpwd_open,
.write = cpwd_write,
.read = cpwd_read,