1 files changed, 14 insertions, 1 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4d46e299afb5..2e70006c7fa8 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -46,6 +46,9 @@ extern const char linux_proc_banner[];
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
 
+#define _RET_IP_                (unsigned long)__builtin_return_address(0)
+#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
+
 #ifdef CONFIG_LBD
 # include <asm/div64.h>
 # define sector_div(a, b) do_div(a, b)
@@ -276,7 +279,17 @@ extern void print_hex_dump(const char *level, const char *prefix_str,
                                 const void *buf, size_t len, bool ascii);
 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
                         const void *buf, size_t len);
-#define hex_asc(x)      "0123456789abcdef"[x]
+
+extern const char hex_asc[];
+#define hex_asc_lo(x)   hex_asc[((x) & 0x0f)]
+#define hex_asc_hi(x)   hex_asc[((x) & 0xf0) >> 4]
+
+static inline char *pack_hex_byte(char *buf, u8 byte)
+{
+        *buf++ = hex_asc_hi(byte);
+        *buf++ = hex_asc_lo(byte);
+        return buf;
+}
 
 #define pr_emerg(fmt, arg...) \
         printk(KERN_EMERG fmt, ##arg)