About multi-line printk and the need (not) to repeat loglevel markers [Was: Re: [PATCH] ARM: mx3/pcm037: properly allocate memory for mx3-camera]

[Joe Perches]

On Tue, 23 Nov 2010, Russell King - ARM Linux wrote:

> On Wed, Nov 24, 2010 at 07:16:06AM +0900, Linus Torvalds wrote:
> > No. The KERN_WARNING in the middle of a string is always totally
> > bogus. There is no "should be". It's just wrong.
> Oh dear.
> Sounds like this is something which needs auditing as a result of your
> change, and sounds like its something that kernelnewbies people could
> do.  My own greps haven't revealed any cases though.

They used to.  I tried to fix all of the ones I could find
about a year ago.

commit ad361c9884e809340f6daca80d56a9e9c871690a
Author: Joe Perches <joe at perches.com>
Date:   Mon Jul 6 13:05:40 2009 -0700

    Remove multiple KERN_ prefixes from printk formats

    Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up
    handling of log-levels and newlines") changed printk semantics.  printk
    lines with multiple KERN_<level> prefixes are no longer emitted as
    before the patch.

    <level> is now included in the output on each additional use.

    Remove all uses of multiple KERN_<level>s in formats.

    Signed-off-by: Joe Perches <joe at perches.com>
    Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>