On Sat, 2005-11-05 at 10:10 +0000, Russell King wrote:
> It's probably better to use a union with these, eg:
The common idiom in the watchdog drivers seems to be to use separate
variables. I'll leave it up to Wim if he wants to change that.
The following makes drivers/char/watchdog/sa1100_wdt.c sparse clean.
Signed-off-by: Ian Campbell <[email protected]>
Index: 2.6/drivers/char/watchdog/sa1100_wdt.c
===================================================================
--- 2.6.orig/drivers/char/watchdog/sa1100_wdt.c 2005-11-03 11:02:05.000000000 +0000
+++ 2.6/drivers/char/watchdog/sa1100_wdt.c 2005-11-07 09:51:47.000000000 +0000
@@ -74,7 +74,7 @@
return 0;
}
-static ssize_t sa1100dog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
{
if (len)
/* Refresh OSMR3 timer. */
@@ -93,23 +93,24 @@
{
int ret = -ENOIOCTLCMD;
int time;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
switch (cmd) {
case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
+ ret = copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
break;
case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
+ ret = put_user(0, p);
break;
case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
+ ret = put_user(boot_status, p);
break;
case WDIOC_SETTIMEOUT:
- ret = get_user(time, (int *)arg);
+ ret = get_user(time, p);
if (ret)
break;
@@ -123,7 +124,7 @@
/*fall through*/
case WDIOC_GETTIMEOUT:
- ret = put_user(pre_margin / OSCR_FREQ, (int *)arg);
+ ret = put_user(pre_margin / OSCR_FREQ, p);
break;
case WDIOC_KEEPALIVE:
--
Ian Campbell, Senior Design Engineer
Web: http://www.arcom.com
Arcom, Clifton Road, Direct: +44 (0)1223 403 465
Cambridge CB1 7EA, United Kingdom Phone: +44 (0)1223 411 200
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