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Date: Wed, 17 Nov 2010 16:26:57 +0100 From: Arnd Bergmann <arnd@...db.de> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de> Subject: [PATCH 5/7] BKL: disable by default 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@...db.de> --- lib/Kconfig.debug | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 28b42b9..65aaefd 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -471,12 +471,12 @@ config DEBUG_MUTEXES config BKL bool "Big Kernel Lock" if (SMP || PREEMPT) - default y + default !(SMP || PREEMPT) 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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