1 files changed, 26 insertions, 3 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index b6de9a6f7018..5a9d9059520b 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -56,6 +56,8 @@
 
 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+
+/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
 #define roundup(x, y) (                                 \
 {                                                       \
         const typeof(y) __y = y;                        \
@@ -141,9 +143,22 @@ extern int _cond_resched(void);
 
 #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
 
-#define abs(x) ({                               \
-                long __x = (x);                 \
-                (__x < 0) ? -__x : __x;         \
+/*
+ * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
+ * input types abs() returns a signed long.
+ * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
+ * for those.
+ */
+#define abs(x) ({                                               \
+                long ret;                                       \
+                if (sizeof(x) == sizeof(long)) {                \
+                        long __x = (x);                         \
+                        ret = (__x < 0) ? -__x : __x;           \
+                } else {                                        \
+                        int __x = (x);                          \
+                        ret = (__x < 0) ? -__x : __x;           \
+                }                                               \
+                ret;                                            \
         })
 
 #define abs64(x) ({                             \
@@ -263,6 +278,7 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
 }
 
 extern int hex_to_bin(char ch);
+extern void hex2bin(u8 *dst, const char *src, size_t count);
 
 /*
  * General tracing related utility functions - trace_printk(),
@@ -584,6 +600,13 @@ struct sysinfo {
 #define NUMA_BUILD 0
 #endif
 
+/* This helps us avoid #ifdef CONFIG_COMPACTION */
+#ifdef CONFIG_COMPACTION
+#define COMPACTION_BUILD 1
+#else
+#define COMPACTION_BUILD 0
+#endif
+
 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD