linux-kernel - Re: [GIT, RFC] Killing the Big Kernel Lock

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Date:	Thu, 25 Mar 2010 16:40:38 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Matthew Wilcox <matthew@....cx>,
	Thomas Gleixner <tglx@...utronix.de>, jblunck@...e.de,
	Alan Cox <alan@...ux.intel.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [GIT, RFC] Killing the Big Kernel Lock

There is a typo in this one:

commit 12c8fcce56c0de4fdcacf048fe723c8778af940d
Author: Arnd Bergmann <arnd@...ay.de.ibm.com>
Date:   Wed Mar 24 20:08:55 2010 +0100

    block: replace BKL with global mutex
    
    It doesn't seem to interact with much else, so give
    this a try.

    Signed-off-by: Arnd Bergmann <arnd@...db.de>

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index d9d6206..9c1277a 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c

	[ snip ]

@@ -1641,7 +1643,7 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev,
 
        ret = -ENXIO;
 
-       lock_kernel();
+       mutex_unlock(&blkdev_mutex);
        p = dev_to_part(dev);
        bdev = bdget(part_devt(p));
        if (bdev == NULL)


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