linux-kernel - [PATCH] x86: _edata should include all .data.* sections on X86

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Message-Id: <1247565175.28240.37.camel@pc1117.cambridge.arm.com>
Date:	Tue, 14 Jul 2009 10:52:55 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Alexey Fisher <bug-track@...her-privat.net>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>, Ingo Molnar <mingo@...e.hu>,
	x86@...nel.org
Subject: [PATCH] x86: _edata should include all .data.* sections on X86_64

The .data.read_mostly and .data.cacheline_aligned sections aren't
covered by the _sdata .. _edata range on X86_64. This affects the
kmemleak reporting leading to possible false positives by not scanning
all the whole data section.

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Cc: Sam Ravnborg <sam@...nborg.org>
Cc: Ingo Molnar <mingo@...e.hu>
---

(I re-posted this patch with comments and cc'ing the relevant people)

 arch/x86/kernel/vmlinux.lds.S |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 367e878..59f31d2 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -112,11 +112,6 @@ SECTIONS
 		_sdata = .;
 		DATA_DATA
 		CONSTRUCTORS
-
-#ifdef CONFIG_X86_64
-		/* End of data section */
-		_edata = .;
-#endif
 	} :data
 
 #ifdef CONFIG_X86_32
@@ -156,10 +151,8 @@ SECTIONS
 	.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
 		*(.data.read_mostly)
 
-#ifdef CONFIG_X86_32
 		/* End of data section */
 		_edata = .;
-#endif
 	}
 
 #ifdef CONFIG_X86_64


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