netdev - Re: [PATCH] Prefix each line of multiline printk(KERN_<level> "foo\nbar") with KERN

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Date:	Sun, 26 Aug 2007 06:54:10 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"Geert Uytterhoeven" <geert@...ux-m68k.org>
Cc:	"Joe Perches" <joe@...ches.com>, linux-kernel@...r.kernel.org,
	blinux-list@...hat.com, cluster-devel@...hat.com,
	discuss@...-64.org, jffs-dev@...s.com, linux-acpi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-mm@...ck.org, linux-mtd@...ts.infradead.org,
	linux-scsi@...r.kernel.org, mpt_linux_developer@....com,
	netdev@...r.kernel.org, osst-users@...ts.sourceforge.net,
	parisc-linux@...isc-linux.org, tpmdd-devel@...ts.sourceforge.net,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: Re: [PATCH] Prefix each line of multiline printk(KERN_<level> "foo\nbar") with KERN_<level>

On 8/26/07, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> On Fri, 24 Aug 2007, Joe Perches wrote:
> > Corrected printk calls with multiple output lines which
> > did not correctly preface each line with KERN_<level>
> >
> > Fixed uses of some single lines with too many KERN_<level>
>
> > --- a/arch/arm/kernel/ecard.c
> > +++ b/arch/arm/kernel/ecard.c
> > @@ -547,7 +547,8 @@ static void ecard_check_lockup(struct irq_desc *desc)
> >       if (last == jiffies) {
> >               lockup += 1;
> >               if (lockup > 1000000) {
> > -                     printk(KERN_ERR "\nInterrupt lockup detected - "
> > +                     printk(KERN_ERR "\n"
> > +                            KERN_ERR "Interrupt lockup detected - "
> >                              "disabling all expansion card interrupts\n");
> >
> >                       desc->chip->mask(IRQ_EXPANSIONCARD);
>
> What's the purpose of having lines printed with e.g. `KERN_ERR "\n"' only?
> Shouldn't these just be removed?
>
> Usually lines starting with `\n' are continuations, but given some other
> module may call printk() in between, there's no guarantee continuations
> appear on the same line.

erm, i thought the prink lock was grabbed per-buffer, not per-line ...
so yes, if the function calls were like printk(KERN_ERR "\n");
printk(KERN_ERR "..."); things could be broken up, but this is on
function call, so it shouldnt ...
-mike
-
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