Use ppsratecheck() for ratelimiting in the LinuxKPI.

Suggested by:		cem @
MFC after:		1 week
Sponsored by:		Mellanox Technologies

3 files changed, 14 insertions, 18 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/device.h b/sys/compat/linuxkpi/common/include/linux/device.h
index fbd8834629ae..d85282af4c14 100644
--- a/sys/compat/linuxkpi/common/include/linux/device.h
+++ b/sys/compat/linuxkpi/common/include/linux/device.h
@@ -145,13 +145,13 @@ show_class_attr_string(struct class *class,
 	    device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
 
 #define	dev_err_ratelimited(dev, ...) do {	\
-	static time_t __ratelimited;		\
+	static linux_ratelimit_t __ratelimited;	\
 	if (linux_ratelimited(&__ratelimited))	\
 		dev_err(dev, __VA_ARGS__);	\
 } while (0)
 
 #define	dev_warn_ratelimited(dev, ...) do {	\
-	static time_t __ratelimited;		\
+	static linux_ratelimit_t __ratelimited;	\
 	if (linux_ratelimited(&__ratelimited))	\
 		dev_warn(dev, __VA_ARGS__);	\
 } while (0)
diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index 3b7a83f88f07..d4999e820058 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -41,6 +41,7 @@
 #include <sys/smp.h>
 #include <sys/stddef.h>
 #include <sys/syslog.h>
+#include <sys/time.h>
 
 #include <linux/bitops.h>
 #include <linux/compiler.h>
@@ -225,7 +226,7 @@ scnprintf(char *buf, size_t size, const char *fmt, ...)
 #define pr_cont(fmt, ...) \
 	printk(KERN_CONT fmt, ##__VA_ARGS__)
 #define	pr_warn_ratelimited(...) do {		\
-	static time_t __ratelimited;		\
+	static linux_ratelimit_t __ratelimited;	\
 	if (linux_ratelimited(&__ratelimited))	\
 		pr_warning(__VA_ARGS__);	\
 } while (0)
@@ -423,6 +424,15 @@ abs64(int64_t x)
 	return (x < 0 ? -x : x);
 }
 
-extern bool linux_ratelimited(time_t *);
+typedef struct linux_ratelimit {
+	struct timeval lasttime;
+	int counter;
+} linux_ratelimit_t;
+
+static inline bool
+linux_ratelimited(linux_ratelimit_t *rl)
+{
+	return (ppsratecheck(&rl->lasttime, &rl->counter, 1));
+}
 
 #endif	/* _LINUX_KERNEL_H_ */
diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c
index 62682f087665..37f607cf8861 100644
--- a/sys/compat/linuxkpi/common/src/linux_compat.c
+++ b/sys/compat/linuxkpi/common/src/linux_compat.c
@@ -1484,20 +1484,6 @@ __unregister_chrdev(unsigned int major, unsigned int baseminor,
 bool linux_cpu_has_clflush;
 #endif
 
-bool
-linux_ratelimited(time_t *ptime)
-{
-	/* make sure uptime is not zero by OR'ing bit 31 */
-	time_t curr = time_uptime | (1U << 31);
-
-	/* check if one or more seconds have passed */
-	if (*ptime != curr) {
-		*ptime = curr;
-		return (1);
-	}
-	return (0);
-}
-
 static void
 linux_compat_init(void *arg)
 {