datapath: Rename linux-2.6 and compat-2.6 directories.

[sliver-openvswitch.git] / datapath / linux / compat / include / linux / kernel.h

diff --git a/datapath/linux/compat/include/linux/kernel.h b/datapath/linux/compat/include/linux/kernel.h
new file mode 100644 (file)
index 0000000..4af8851
--- /dev/null
+++ b/datapath/linux/compat/include/linux/kernel.h
@@ -0,0 +1,61 @@
+#ifndef __KERNEL_H_WRAPPER
+#define __KERNEL_H_WRAPPER 1
+
+#include_next <linux/kernel.h>
+#ifndef HAVE_LOG2_H
+#include <linux/log2.h>
+#endif
+
+#include <linux/version.h>
+#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
+
+#ifndef BUILD_BUG_ON_NOT_POWER_OF_2
+/* Force a compilation error if a constant expression is not a power of 2 */
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n)                 \
+       BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
+#endif
+
+#if defined(CONFIG_PREEMPT) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
+#error "CONFIG_PREEMPT is broken before 2.6.21--see commit 4498121ca3, \"[NET]: Handle disabled preemption in gfp_any()\""
+#endif
+
+#ifndef USHRT_MAX
+#define USHRT_MAX      ((u16)(~0U))
+#define SHRT_MAX       ((s16)(USHRT_MAX>>1))
+#define SHRT_MIN       ((s16)(-SHRT_MAX - 1))
+#endif
+
+#ifndef DIV_ROUND_UP
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#endif
+
+#endif /* linux/kernel.h */