[PATCH v12 09/16] arm64/kexec: Add pr_devel output

[geoff@infradead.org (Geoff Levand)]

On Tue, 2015-12-15 at 17:15 +0000, Will Deacon wrote:
> On Tue, Nov 24, 2015 at 10:25:34PM +0000, Geoff Levand wrote:
> > To aid in debugging kexec problems or when adding new functionality to kexec add
> > a new routine kexec_image_info() and several inline pr_devel statements.
> 
> We don't currently have any pr_devel invocations under arm64. Can you
> either remove these or change them to pr_debug?

OK.

> > Signed-off-by: Geoff Levand <geoff@infradead.org>
> > ---
> >  arch/arm64/kernel/machine_kexec.c | 63 +++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 63 insertions(+)
> > 
> > diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
> > index 8b990b8..da28a26 100644
> > --- a/arch/arm64/kernel/machine_kexec.c
> > +++ b/arch/arm64/kernel/machine_kexec.c
> > @@ -25,6 +25,48 @@ extern const unsigned long arm64_relocate_new_kernel_size;
> >  
> >  static unsigned long kimage_start;
> >  
> > +/**
> > + * kexec_is_dtb - Helper routine to check the device tree header signature.
> > + */
> > +static bool kexec_is_dtb(const void *dtb)
> > +{
> > +> > 	> > __be32 magic;
> > +
> > +> > 	> > return get_user(magic, (__be32 *)dtb) ? false :
> > +> > 	> > 	> > (be32_to_cpu(magic) == OF_DT_HEADER);
> 
> Isn't there an fdt32_to_cpu helper for this already? I also can't help
> but thing this would be more readable if you didn't bother with the
> ternary if form.

Sure, I'll clean it up.

-Geoff