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Date: Sun,  3 Sep 2017 13:07:30 +0100
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
To: linux-arm-kernel@...ts.infradead.org,
	kernel-hardening@...ts.openwall.com
Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nico@...aro.org>,
	Russell King <linux@...linux.org.uk>,
	Kees Cook <keescook@...omium.org>,
	Thomas Garnier <thgarnie@...gle.com>,
	Marc Zyngier <marc.zyngier@....com>,
	Mark Rutland <mark.rutland@....com>,
	Tony Lindgren <tony@...mide.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Dave Martin <dave.martin@....com>
Subject: [PATCH v2 02/29] asm-generic: add .data.rel.ro sections to __ro_after_init

When running in PIC mode, the compiler will emit const structures
containing runtime relocatable quantities into .data.rel.ro.* sections,
so that the linker can be smart about placing them together in a segment
that is read-write initially, and is remapped read-only afterwards. This
is exactly what __ro_after_init aims to provide, so move these sections
together.

Acked-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
---
 include/asm-generic/vmlinux.lds.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index da0be9a8d1de..d16537b0b102 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -261,7 +261,7 @@
 #ifndef RO_AFTER_INIT_DATA
 #define RO_AFTER_INIT_DATA						\
 	VMLINUX_SYMBOL(__start_ro_after_init) = .;			\
-	*(.data..ro_after_init)						\
+	*(.data..ro_after_init .data.rel.ro.*)				\
 	VMLINUX_SYMBOL(__end_ro_after_init) = .;
 #endif
 
-- 
2.11.0

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