Author: hselasky
Date: Thu Mar 23 10:48:10 2017
New Revision: 315856
URL: https://svnweb.freebsd.org/changeset/base/315856
Log:
Add support for ratelimited printouts in the LinuxKPI.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/compat/linuxkpi/common/include/linux/device.h
head/sys/compat/linuxkpi/common/include/linux/kernel.h
head/sys/compat/linuxkpi/common/src/linux_compat.c
Modified: head/sys/compat/linuxkpi/common/include/linux/device.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/device.h Thu Mar 23
10:43:29 2017 (r315855)
+++ head/sys/compat/linuxkpi/common/include/linux/device.h Thu Mar 23
10:48:10 2017 (r315856)
@@ -144,6 +144,18 @@ show_class_attr_string(struct class *cla
#define dev_printk(lvl, dev, fmt, ...)
\
device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
+#define dev_err_ratelimited(dev, ...) do { \
+ static time_t __ratelimited; \
+ if (linux_ratelimited(&__ratelimited)) \
+ dev_err(dev, __VA_ARGS__); \
+} while (0)
+
+#define dev_warn_ratelimited(dev, ...) do { \
+ static time_t __ratelimited; \
+ if (linux_ratelimited(&__ratelimited)) \
+ dev_warn(dev, __VA_ARGS__); \
+} while (0)
+
static inline void *
dev_get_drvdata(const struct device *dev)
{
Modified: head/sys/compat/linuxkpi/common/include/linux/kernel.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/kernel.h Thu Mar 23
10:43:29 2017 (r315855)
+++ head/sys/compat/linuxkpi/common/include/linux/kernel.h Thu Mar 23
10:48:10 2017 (r315856)
@@ -224,6 +224,11 @@ scnprintf(char *buf, size_t size, const
log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
#define pr_cont(fmt, ...) \
printk(KERN_CONT fmt, ##__VA_ARGS__)
+#define pr_warn_ratelimited(...) do { \
+ static time_t __ratelimited; \
+ if (linux_ratelimited(&__ratelimited)) \
+ pr_warning(__VA_ARGS__); \
+} while (0)
#ifndef WARN
#define WARN(condition, ...) ({ \
@@ -331,4 +336,6 @@ abs64(int64_t x)
return (x < 0 ? -x : x);
}
+extern bool linux_ratelimited(time_t *);
+
#endif /* _LINUX_KERNEL_H_ */
Modified: head/sys/compat/linuxkpi/common/src/linux_compat.c
==============================================================================
--- head/sys/compat/linuxkpi/common/src/linux_compat.c Thu Mar 23 10:43:29
2017 (r315855)
+++ head/sys/compat/linuxkpi/common/src/linux_compat.c Thu Mar 23 10:48:10
2017 (r315856)
@@ -1484,6 +1484,20 @@ __unregister_chrdev(unsigned int major,
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)
{
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