linux-kernel - [PATCH] Let CONFIG_STRICT_DEVMEM depends on CONFIG

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Date:   Thu, 6 Oct 2016 13:12:17 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>, Ingo Molnar <mingo@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        paulmck@...ux.vnet.ibm.com, Josh Poimboeuf <jpoimboe@...hat.com>,
        Tejun Heo <tj@...nel.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: [PATCH] Let CONFIG_STRICT_DEVMEM depends on CONFIG_DEVMEM

With CONFIG_DEVMEM not set, CONFIG_STRICT_DEVMEM will be useless
even if it is set =y, thus let's update the dependency in Kconfig.

Signed-off-by: Dave Young <dyoung@...hat.com>
---
 lib/Kconfig.debug |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-x86.orig/lib/Kconfig.debug
+++ linux-x86/lib/Kconfig.debug
@@ -1980,7 +1980,7 @@ config ARCH_HAS_DEVMEM_IS_ALLOWED
 
 config STRICT_DEVMEM
 	bool "Filter access to /dev/mem"
-	depends on MMU
+	depends on MMU && DEVMEM
 	depends on ARCH_HAS_DEVMEM_IS_ALLOWED
 	default y if TILE || PPC
 	---help---