From: Michael Ellerman <michael@ellerman.id.au>
Date: Thu, 28 May 2009 19:33:34 +0000 (+0000)
Subject: powerpc/ftrace: Use ppc_function_entry() instead of GET_ADDR
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4a9e3f8e94d6740fbd3f149f2aa4caa82a6427ed;p=linux-beck.git

powerpc/ftrace: Use ppc_function_entry() instead of GET_ADDR

Use ppc_function_entry() from code-patching.h.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 2d182f119d1d..f7eadf5ddec3 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -23,12 +23,6 @@
 #include <asm/code-patching.h>
 #include <asm/ftrace.h>
 
-#ifdef CONFIG_PPC32
-# define GET_ADDR(addr) addr
-#else
-/* PowerPC64's functions are data that points to the functions */
-# define GET_ADDR(addr) (*(unsigned long *)addr)
-#endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 static unsigned int ftrace_nop_replace(void)
@@ -41,7 +35,7 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link)
 {
 	unsigned int op;
 
-	addr = GET_ADDR(addr);
+	addr = ppc_function_entry((void *)addr);
 
 	/* if (link) set op to 'bl' else 'b' */
 	op = create_branch((unsigned int *)ip, addr, link ? 1 : 0);
@@ -197,7 +191,7 @@ __ftrace_make_nop(struct module *mod,
 	ptr = ((unsigned long)jmp[0] << 32) + jmp[1];
 
 	/* This should match what was called */
-	if (ptr != GET_ADDR(addr)) {
+	if (ptr != ppc_function_entry((void *)addr)) {
 		printk(KERN_ERR "addr does not match %lx\n", ptr);
 		return -EINVAL;
 	}
@@ -570,7 +564,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 		return_hooker = (unsigned long)&mod_return_to_handler;
 #endif
 
-	return_hooker = GET_ADDR(return_hooker);
+	return_hooker = ppc_function_entry((void *)return_hooker);
 
 	/*
 	 * Protect against fault, even if it shouldn't