linux-kernel - Re: [RFC] kallsyms_lookup always requires buffers

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Date:	Tue, 22 Aug 2006 15:54:36 +0200
From:	Franck Bui-Huu <vagabon.xyz@...il.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Franck <vagabon.xyz@...il.com>, rusty@...tcorp.com.au,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] kallsyms_lookup always requires buffers

Hi

Arjan van de Ven wrote:
>> +}
>> +EXPORT_SYMBOL_GPL(kallsyms_lookup_gently);
> 
> 
> Hi,
> 
> there don't seem to be modular users so please don't export it since
> that export just eats up useless space. (we have way too many of those
> already)
> 

true.

> (Also I suggest you submit at least one user with your patch but that's
> another matter)
> 

mips could be one of the future users, see patch below.

thanks
		Franck

-- >8 --

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 951bf9c..eb80db5 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -344,8 +344,6 @@ static int __init frame_info_init(void)
 {
 	int i;
 #ifdef CONFIG_KALLSYMS
-	char *modname;
-	char namebuf[KSYM_NAME_LEN + 1];
 	unsigned long start, size, ofs;
 	extern char __sched_text_start[], __sched_text_end[];
 	extern char __lock_text_start[], __lock_text_end[];
@@ -354,7 +352,7 @@ #ifdef CONFIG_KALLSYMS
 	for (i = 0; i < ARRAY_SIZE(mfinfo); i++) {
 		if (start == (unsigned long)schedule)
 			schedule_frame = &mfinfo[i];
-		if (!kallsyms_lookup(start, &size, &ofs, &modname, namebuf))
+		if (!kallsyms_lookup_gently(start, &size, &ofs))
 			break;
 		mfinfo[i].func = (void *)(start + ofs);
 		mfinfo[i].func_size = size;
@@ -454,8 +452,6 @@ unsigned long unwind_stack(struct task_s
 {
 	unsigned long stack_page;
 	struct mips_frame_info info;
-	char *modname;
-	char namebuf[KSYM_NAME_LEN + 1];
 	unsigned long size, ofs;
 	int leaf;
 
@@ -463,7 +459,7 @@ unsigned long unwind_stack(struct task_s
 	if (!stack_page)
 		return 0;
 
-	if (!kallsyms_lookup(pc, &size, &ofs, &modname, namebuf))
+	if (!kallsyms_lookup_gently(pc, &size, &ofs))
 		return 0;
 	if (ofs == 0)
 		return 0;
-
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