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From: Arnd Bergmann <arnd@arndb.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 2/4] BKL: disable by default
Date: Tue, 18 Jan 2011 22:17:00 +0100	[thread overview]
Message-ID: <1295385422-3592-3-git-send-email-arnd@arndb.de> (raw)
In-Reply-To: <1295385422-3592-1-git-send-email-arnd@arndb.de>

As discussed at the kernel summit, this change disables
the big kernel lock by default. It is still possible to
enable it in order to build the modules that use it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 lib/Kconfig.debug |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2d05adb..f2a399c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -472,12 +472,11 @@ config DEBUG_MUTEXES
 
 config BKL
 	bool "Big Kernel Lock" if (SMP || PREEMPT)
-	default y
 	help
 	  This is the traditional lock that is used in old code instead
-	  of proper locking. All drivers that use the BKL should depend
-	  on this symbol.
-	  Say Y here unless you are working on removing the BKL.
+	  of proper locking. The big kernel lock will go away in 2.6.39,
+	  so all modules that still depend on it need to be changed or
+	  they will be removed as well.
 
 config DEBUG_LOCK_ALLOC
 	bool "Lock debugging: detect incorrect freeing of live locks"
-- 
1.7.1


  parent reply	other threads:[~2011-01-18 21:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-18 21:16 [PATCH 0/4] Phasing out the BKL Arnd Bergmann
2011-01-18 21:16 ` [PATCH 1/4] drm/i810: remove " Arnd Bergmann
2011-01-18 21:17 ` Arnd Bergmann [this message]
2011-01-18 21:17 ` [PATCH 3/4] BKL: mark lock_kernel as deprecated Arnd Bergmann
2011-01-18 21:17 ` [PATCH 4/4] BKL: move CONFIG_BKL to staging Arnd Bergmann
2011-01-19 15:44   ` Nick Bowler
2011-01-19 16:17     ` Arnd Bergmann
2011-01-19 18:21       ` Nick Bowler
2011-01-23 22:19         ` Andrew Hendry
     [not found]         ` <AANLkTimOzU328aHnB7+ERSq1ovPBSZgxNQsYRhLghH5L@mail.gmail.com>
2011-01-24 15:59           ` Arnd Bergmann
2011-01-25  0:33             ` Andrew Hendry
2011-01-25 12:06               ` Arnd Bergmann

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