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s390/diag: add a statistic for diagnose calls

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Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose
calls have been done by each CPU in the system.

Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Martin Schwidefsky 2015-08-20 17:28:44 +02:00
commit 1ec2772e0c
19 changed files with 282 additions and 19 deletions
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4
drivers/watchdog/diag288_wdt.c
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@ -29,6 +29,7 @@
#include <linux/watchdog.h>
#include <linux/suspend.h>
#include <asm/ebcdic.h>
#include <asm/diag.h>
#include <linux/io.h>
#include <linux/uaccess.h>
@ -94,12 +95,14 @@ static int __diag288(unsigned int func, unsigned int timeout,
static int __diag288_vm(unsigned int func, unsigned int timeout,
char *cmd, size_t len)
{
diag_stat_inc(DIAG_STAT_X288);
return __diag288(func, timeout, virt_to_phys(cmd), len);
}
static int __diag288_lpar(unsigned int func, unsigned int timeout,
unsigned long action)
{
diag_stat_inc(DIAG_STAT_X288);
return __diag288(func, timeout, action, 0);
}
@ -141,6 +144,7 @@ static int wdt_stop(struct watchdog_device *dev)
{
int ret;
diag_stat_inc(DIAG_STAT_X288);
ret = __diag288(WDT_FUNC_CANCEL, 0, 0, 0);
return ret;
}