linux-kernel - Re: [PATCH] x86, dumpstack: Fix unused variable warning.

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Message-ID: <AANLkTik9U_Z0WSZ7YjrykER_pBUfPDdgUUmtYx=R74nL@mail.gmail.com>
Date:	Thu, 25 Nov 2010 11:35:16 +0600
From:	Rakib Mullick <rakib.mullick@...il.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	x86@...nel.org, sandmann@...hat.com
Subject: Re: [PATCH] x86, dumpstack: Fix unused variable warning.

On Wed, Nov 24, 2010 at 7:19 PM, Frederic Weisbecker <fweisbec@...il.com> wrote:
> 2010/11/24 Rakib Mullick <rakib.mullick@...il.com>:
>
> Looks like you can even remove that block. bp is not used any more in
> this function.
> get_bp() was only loading bp but did not make any use of it.

Yes, right. Here is the updated one.

 In dump_stack function, bp isn't used anymore, which is introduced by
commit 9c0729dc8062bed96189bd14ac6d4920f3958743. This patch removes bp
completely.


Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
---

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 8474c99..d6fb146 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -197,14 +197,8 @@ void show_stack(struct task_struct *task,
unsigned long *sp)
  */
 void dump_stack(void)
 {
-	unsigned long bp = 0;
 	unsigned long stack;

-#ifdef CONFIG_FRAME_POINTER
-	if (!bp)
-		get_bp(bp);
-#endif
-
 	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
 		current->pid, current->comm, print_tainted(),
 		init_utsname()->release,


>
> Thanks.
>
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