datapath: Add compat functions for pr_*.

In the earliest kernels that we support this family of macros
wasn't defined at all.  Later they were defined but did not include
the module name.  Finally, pr_warn was made a synonym for pr_warning.
This harmonizes the behavior across all kernels.

Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --git a/datapath/linux-2.6/compat-2.6/include/linux/kernel.h b/datapath/linux-2.6/compat-2.6/include/linux/kernel.h
index 9459155..1f65c09 100644 (file)
--- a/datapath/linux-2.6/compat-2.6/include/linux/kernel.h
+++ b/datapath/linux-2.6/compat-2.6/include/linux/kernel.h
@@ -6,4 +6,35 @@
 #include <linux/log2.h>
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+#undef pr_emerg
+#define pr_emerg(fmt, ...) \
+        printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_alert
+#define pr_alert(fmt, ...) \
+        printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_crit
+#define pr_crit(fmt, ...) \
+        printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_err
+#define pr_err(fmt, ...) \
+        printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_warning
+#define pr_warning(fmt, ...) \
+        printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_notice
+#define pr_notice(fmt, ...) \
+        printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_info
+#define pr_info(fmt, ...) \
+        printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
+#undef pr_cont
+#define pr_cont(fmt, ...) \
+       printk(KERN_CONT fmt, ##__VA_ARGS__)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+#define pr_warn pr_warning
+#endif
+
 #endif /* linux/kernel.h */