linux-kernel - [PATCH 1/2] init/Kconfig: Hide printk log config if CONFIG

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Date:	Fri, 3 Oct 2014 16:29:21 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	"Yann E. MORIN" <yann.morin.1998@...e.fr>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eric Paris <eparis@...hat.com>, Michal Hocko <mhocko@...e.cz>,
	Matt Turner <mattst88@...il.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	蔡正龙 <zhenglong.cai@...c.com.cn>,
	Tejun Heo <tj@...nel.org>, Fabian Frederick <fabf@...net.be>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	Peter Foley <pefoley2@...oley.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>, Oleg Nesterov <oleg@...hat.com>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] init/Kconfig: Hide printk log config if CONFIG_PRINTK=n

The buffers sized by CONFIG_LOG_BUF_SHIFT and
CONFIG_LOG_CPU_MAX_BUF_SHIFT do not exist if CONFIG_PRINTK=n, so don't
ask about their size at all.

Signed-off-by: Josh Triplett <josh@...htriplett.org>
---

Posting for review.  I can upstream this through the tiny tree.

 init/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index e84c642..31505a5 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -811,6 +811,7 @@ config LOG_BUF_SHIFT
 	int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
 	range 12 21
 	default 17
+	depends on PRINTK
 	help
 	  Select the minimal kernel log buffer size as a power of 2.
 	  The final size is affected by LOG_CPU_MAX_BUF_SHIFT config
@@ -830,6 +831,7 @@ config LOG_CPU_MAX_BUF_SHIFT
 	range 0 21
 	default 12 if !BASE_SMALL
 	default 0 if BASE_SMALL
+	depends on PRINTK
 	help
 	  This option allows to increase the default ring buffer size
 	  according to the number of CPUs. The value defines the contribution
-- 
2.1.1

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