Re: [PATCH] pm: remove unused asm/suspend.h

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On Wed, May 13, 2009 at 10:24 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> On Wednesday 13 May 2009, Magnus Damm wrote:
>> On Wed, May 13, 2009 at 4:32 AM, Pavel Machek <pavel@xxxxxx> wrote:
>> > On Tue 2009-05-12 22:16:06, Magnus Damm wrote:
>> >>
>> >> From: Magnus Damm <damm@xxxxxxxxxx>
>> >>
>> >> This patch removes unused asm/suspend.h files for
>> >> the following architectures:
>> >>
>> >>  alpha, arm, ia64, m68k, mips, s390, um
>> >>
>> >> Signed-off-by: Magnus Damm <damm@xxxxxxxxxx>
>> >
>> > Are you sure? arm does support suspend...
>>
>> Not sure, but these days <asm/suspend.h> is only included from
>> kernel/power/disk.c. And that file is only built if CONFIG_HIBERNATION
>> is set. I've grepped for arch_prepare_suspend and
>> ARCH_HIBERNATION_POSSIBLE but I don't get any matches under
>> arch/arm...
>>
>> Or am I misunderstanding? =)
>
> Sounds reasonable, but have you actually tested compilation on the
> architectures you're changing?

No, I have not. However, grepping shows that it's pretty safe:

$ find . | xargs grep asm/suspend

(files in arch/powerpc, arch/x86, arch/sh and kernel/power/disk.c)

Basically, the patch is doing further cleanups on top of:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a8af78982ff4c0b3731527b0217d286a343a3089

Since that patch is included upstream already it is safe to assume
that <asm/suspend.h> is only needed by architectures setting
ARCH_HIBERNATION_POSSIBLE. Which means powerpc, x86 and sh. The rest
of the header files can go away.

Still want me to compile test for all architectures affected?

Thanks,

/ magnus
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