From a442ac512f36981182e66a427ad05f449ff6593b Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 15 May 2008 17:50:37 -0700
Subject: [PATCH] Clean up 'print_fn_descriptor_symbol()' types

Everybody wants to pass it a function pointer, and in fact, that is what
you _must_ pass it for it to make sense (since it knows that ia64 and
ppc64 use descriptors for function pointers and fetches the actual
address from there).

So don't make the argument be a 'unsigned long' and force everybody to
add a cast.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/base/power/main.c |  2 +-
 drivers/pci/quirks.c      |  3 +--
 drivers/pnp/quirks.c      |  3 +--
 include/linux/kallsyms.h  | 24 ++++++++++++++----------
 init/main.c               |  9 +++------
 5 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 7b76fd3b93a..45cc3d9eacb 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -418,7 +418,7 @@ void __suspend_report_result(const char *function, void *fn, int ret)
 {
 	if (ret) {
 		printk(KERN_ERR "%s(): ", function);
-		print_fn_descriptor_symbol("%s() returns ", (unsigned long)fn);
+		print_fn_descriptor_symbol("%s returns ", fn);
 		printk("%d\n", ret);
 	}
 }
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index f2d9c770f51..dabb563f51d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1503,8 +1503,7 @@ static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_f
  		    (f->device == dev->device || f->device == (u16) PCI_ANY_ID)) {
 #ifdef DEBUG
 			dev_dbg(&dev->dev, "calling ");
-			print_fn_descriptor_symbol("%s()\n",
-				(unsigned long) f->hook);
+			print_fn_descriptor_symbol("%s\n", f->hook);
 #endif
 			f->hook(dev);
 		}
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
index ffdb12a59c4..e2b7de4cb05 100644
--- a/drivers/pnp/quirks.c
+++ b/drivers/pnp/quirks.c
@@ -331,8 +331,7 @@ void pnp_fixup_device(struct pnp_dev *dev)
 			continue;
 #ifdef DEBUG
 		dev_dbg(&dev->dev, "%s: calling ", f->id);
-		print_fn_descriptor_symbol("%s\n",
-				(unsigned long) f->quirk_function);
+		print_fn_descriptor_symbol("%s\n", f->quirk_function);
 #endif
 		f->quirk_function(dev);
 	}
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 82de2fb62cb..00c1801099f 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -83,16 +83,6 @@ __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
 
 static inline void print_symbol(const char *fmt, unsigned long addr)
 {
@@ -101,6 +91,20 @@ static inline void print_symbol(const char *fmt, unsigned long addr)
 		       __builtin_extract_return_addr((void *)addr));
 }
 
+/*
+ * Pretty-print a function pointer.
+ *
+ * ia64 and ppc64 function pointers are really function descriptors,
+ * which contain a pointer the real address.
+ */
+static inline void print_fn_descriptor_symbol(const char *fmt, void *addr)
+{
+#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
+	addr = *(void **)addr;
+#endif
+	print_symbol(fmt, (unsigned long)addr);
+}
+
 #ifndef CONFIG_64BIT
 #define print_ip_sym(ip)		\
 do {					\
diff --git a/init/main.c b/init/main.c
index f406fefa626..c62215146a8 100644
--- a/init/main.c
+++ b/init/main.c
@@ -706,8 +706,7 @@ static void __init do_initcalls(void)
 		int result;
 
 		if (initcall_debug) {
-			print_fn_descriptor_symbol("calling  %s()\n",
-					(unsigned long) *call);
+			print_fn_descriptor_symbol("calling  %s\n", *call);
 			t0 = ktime_get();
 		}
 
@@ -717,8 +716,7 @@ static void __init do_initcalls(void)
 			t1 = ktime_get();
 			delta = ktime_sub(t1, t0);
 
-			print_fn_descriptor_symbol("initcall %s()",
-					(unsigned long) *call);
+			print_fn_descriptor_symbol("initcall %s", *call);
 			printk(" returned %d after %Ld msecs\n", result,
 				(unsigned long long) delta.tv64 >> 20);
 		}
@@ -737,8 +735,7 @@ static void __init do_initcalls(void)
 			local_irq_enable();
 		}
 		if (msgbuf[0]) {
-			print_fn_descriptor_symbol(KERN_WARNING "initcall %s()",
-					(unsigned long) *call);
+			print_fn_descriptor_symbol(KERN_WARNING "initcall %s", *call);
 			printk(" returned with %s\n", msgbuf);
 		}
 	}
-- 
2.41.1