compat: backport dev_level_ratelimited()

mcgrof@frijol ~/linux-stable (git::master)$ git describe --contains 6ca04593
v3.5-rc1~147^2~7

This is only enabled for kernels where ratelimit.h was added.

commit 6ca045930338485a8cdef117e74372aa1678009d
Author: Hiroshi DOYU <hdoyu@nvidia.com>
Date:   Mon May 14 10:47:57 2012 +0300

    driver core: Add dev_*_ratelimited() family

    Add dev_*_ratelimited() family, dev_* version of pr_*_ratelimited().

    Using Joe Perches's proposal/implementation.

    Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
    Cc: Joe Perches <joe@perches.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/backport/include/linux/compat-3.5.h b/backport/include/linux/compat-3.5.h
index 7e9e65ac21ebe269e1e33cc785a4029ba42ac834..dbf8f00e82b10386f0a3e94511ab4cb95c2fd353 100644 (file)
--- a/backport/include/linux/compat-3.5.h
+++ b/backport/include/linux/compat-3.5.h
@@ -10,6 +10,42 @@
 
 #include <net/netlink.h>
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
+#include <linux/ratelimit.h>
+#define dev_level_ratelimited(dev_level, dev, fmt, ...)                        \
+do {                                                                   \
+       static DEFINE_RATELIMIT_STATE(_rs,                              \
+                                     DEFAULT_RATELIMIT_INTERVAL,       \
+                                     DEFAULT_RATELIMIT_BURST);         \
+       if (__ratelimit(&_rs))                                          \
+               dev_level(dev, fmt, ##__VA_ARGS__);                     \
+} while (0)
+
+#define dev_emerg_ratelimited(dev, fmt, ...)                           \
+       dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
+#define dev_alert_ratelimited(dev, fmt, ...)                           \
+       dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
+
+
+#if defined(CONFIG_DYNAMIC_DEBUG) || defined(DEBUG)
+#define dev_dbg_ratelimited(dev, fmt, ...)                             \
+do {                                                                   \
+       static DEFINE_RATELIMIT_STATE(_rs,                              \
+                                     DEFAULT_RATELIMIT_INTERVAL,       \
+                                     DEFAULT_RATELIMIT_BURST);         \
+       DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
+       if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) &&        \
+           __ratelimit(&_rs))                                          \
+               __dynamic_pr_debug(&descriptor, pr_fmt(fmt),            \
+                                  ##__VA_ARGS__);                      \
+} while (0)
+#else
+#define dev_dbg_ratelimited(dev, fmt, ...)                     \
+       no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#endif
+
+#endif
+
 /*
  * This backports:
  * commit 569a8fc38367dfafd87454f27ac646c8e6b54bca