linux-kernel - [PATCH 1/2] Don't let LATENCYTOP and LOCKDEP select KALLSYMS

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Message-Id: <1428498405-7019-1-git-send-email-andi@firstfloor.org>
Date:	Wed,  8 Apr 2015 06:06:44 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 1/2] Don't let LATENCYTOP and LOCKDEP select KALLSYMS_ALL

From: Andi Kleen <ak@...ux.intel.com>

KALLSYMS_ALL enables including data variables into KALLSYMS.
With plain KALLSYMS only functions are included.

LATENCYTOP and LOCKDEP select KALLSYMS_ALL in addition to KALLSYMS.
It's unclear what they actually need _ALL for; they should
only need function backtraces and afaik never touch variables.

LTO currently does not support KALLSYMS_ALL, which prevents
LATENCYTOP and LOCKDEP from working and gives Kconfig errors.
Disable the requirement for KALLSYMS_ALL for them, just use
KALLSYMS.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 lib/Kconfig.debug | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 3e0289e..062165c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1001,7 +1001,6 @@ config LOCKDEP
 	select STACKTRACE
 	select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !SCORE
 	select KALLSYMS
-	select KALLSYMS_ALL
 
 config LOCK_STAT
 	bool "Lock usage statistics"
@@ -1469,7 +1468,6 @@ config LATENCYTOP
 	depends on PROC_FS
 	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND && !ARC
 	select KALLSYMS
-	select KALLSYMS_ALL
 	select STACKTRACE
 	select SCHEDSTATS
 	select SCHED_DEBUG
-- 
2.3.3

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