linux-kernel - [RFC/PATCH 2/3] arm: Add ARCH_WANT_OF

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Message-Id: <1392168805-14200-3-git-send-email-lauraa@codeaurora.org>
Date:	Tue, 11 Feb 2014 17:33:24 -0800
From:	Laura Abbott <lauraa@...eaurora.org>
To:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, Arnd Bergmann <arnd@...db.de>
Cc:	Laura Abbott <lauraa@...eaurora.org>, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Kees Cook <keescook@...omium.org>
Subject: [RFC/PATCH 2/3] arm: Add ARCH_WANT_OF_RANDOMNESS

The stack canary for ARM is currently the same across reboots
due to lack of randomness early enough. Add ARCH_WANT_OF_RANDOMNESS
to allow devices to add whatever randomness they need.

Signed-off-by: Laura Abbott <lauraa@...eaurora.org>
---
 arch/arm/Kconfig              |    3 +++
 arch/arm/kernel/vmlinux.lds.S |    1 +
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e254198..7ab0db1 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -222,6 +222,9 @@ config NEED_RET_TO_USER
 config ARCH_MTD_XIP
 	bool
 
+config ARCH_WANT_OF_RANDOMNESS
+	def_bool n
+
 config VECTORS_BASE
 	hex
 	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 7bcee5c..2198258 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -202,6 +202,7 @@ SECTIONS
 		INIT_SETUP(16)
 		INIT_CALLS
 		CON_INITCALL
+		EARLY_RANDOM_FUNCS
 		SECURITY_INITCALL
 		INIT_RAM_FS
 	}
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
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