linux-kernel - Re: [PATCH v1 08/10] kgdb: Remove "weak" from kgdb_arch

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Date:	Fri, 17 Oct 2014 13:29:41 +0530
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jason Wessel <jason.wessel@...driver.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Ingo Molnar <mingo@...hat.com>,
	John Stultz <john.stultz@...aro.org>,
	Eric Paris <eparis@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Harvey Harrison" <harvey.harrison@...il.com>
Subject: Re: [PATCH v1 08/10] kgdb: Remove "weak" from kgdb_arch_pc() declaration

On Thursday 16 October 2014 07:08 PM, Vineet Gupta wrote:
> On Thursday 16 October 2014 05:05 AM, Bjorn Helgaas wrote:
>> > [+cc Harvey, Vineet, linux-sh; arc, sh, and x86 have kgdb_arch_pc()
>> > definitions and could see issues from this]
> Thanks for the heads up !
> 
> I compile tested arc tree (with kgdb) from linux-next of today, which has this
> patch already and things seem to be ok.
> 
> As a hack I reverted the patch and see that kgdb_arch_pc() becomes weak, although
> ARC version was still being pulled in final - it was recored as weak and that
> cause bloat-o-meter to go awry.
> 
> bloat-o-meter vmlinux-with-fix vmlinux-before-fix
> add/remove: 0/1 grow/shrink: 1/0 up/down: 1/-8 (-7)
> function                                     old     new   delta
> vermagic                                      36      37      +1
> kgdb_arch_pc                                 8       -      -8

The ARC definition of kgdb_arch_pc is same as generic one so we might as well drop it.
Can you add the patch below to your series. If not I can add it to ARC changes for
this merge window. Please let me know.

Thx,
-Vineet

---------------------->
>From f01b1db6986924e794eddc038167329d63d1fda9 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@...opsys.com>
Date: Fri, 17 Oct 2014 13:27:03 +0530
Subject: [PATCH] ARC: kgdb: generic kgdb_arch_pc() suffices

Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
---
 arch/arc/kernel/kgdb.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/arc/kernel/kgdb.c b/arch/arc/kernel/kgdb.c
index a2ff5c5d1450..ecf6a7869375 100644
--- a/arch/arc/kernel/kgdb.c
+++ b/arch/arc/kernel/kgdb.c
@@ -158,11 +158,6 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int
err_code,
 	return -1;
 }

-unsigned long kgdb_arch_pc(int exception, struct pt_regs *regs)
-{
-	return instruction_pointer(regs);
-}
-
 int kgdb_arch_init(void)
 {
 	single_step_data.armed = 0;
-- 
1.8.3.2
--
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