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diff --git a/bitops.h b/bitops.h
index 323c571..7f30b06 100644
--- a/bitops.h
+++ b/bitops.h
@@ -65,6 +65,9 @@ static inline unsigned long hweight_long(unsigned long w)
}
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
+#ifndef __always_inline
+#define __always_inline inline __attribute__((always_inline))
+#endif
/**
* __ffs - find first bit in word.
diff --git a/kerncompat.h.orig b/kerncompat.h
index bb03194e127e..28f832a2e625 100644
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -28,6 +28,7 @@
#include <assert.h>
#include <stddef.h>
#include <linux/types.h>
+#include <linux/limits.h>
#include <stdint.h>
#define ptr_to_u64(x) ((u64)(uintptr_t)x)
--- a/rbtree.h
+++ b/rbtree.h
@@ -38,6 +38,10 @@
extern "C" {
#endif
+#ifndef __always_inline
+#define __always_inline inline __attribute__((always_inline))
+#endif
+
struct rb_node {
unsigned long __rb_parent_color;
struct rb_node *rb_right;
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