[PATCH] fix initcall_debug on ppc64/ia64

ia64 and ppc64 have function descriptors.  Booting with initcall_debug will
print the descriptor address, not the address and name of the actual
function.  Another indirection is required.

Tested on ppc, ppc64 and ia64.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/kallsyms.h

@@ -47,6 +47,16 @@ __attribute__((format(printf,1,2)));
 static inline void __check_printsym_format(const char *fmt, ...)
 {
 }
+/* ia64 and ppc64 use function descriptors, which contain the real address */
+#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
+#define print_fn_descriptor_symbol(fmt, addr)		\
+do {						\
+	unsigned long *__faddr = (unsigned long*) addr;		\
+	print_symbol(fmt, __faddr[0]);		\
+} while (0)
+#else
+#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
+#endif
 
 #define print_symbol(fmt, addr)			\
 do {						\

init/main.c

@@ -604,7 +604,7 @@ static void __init do_initcalls(void)
 
 		if (initcall_debug) {
 			printk(KERN_DEBUG "Calling initcall 0x%p", *call);
-			print_symbol(": %s()", (unsigned long) *call);
+			print_fn_descriptor_symbol(": %s()", (unsigned long) *call);
 			printk("\n");
 		}