Re: linux-next: build failure after merge of the pm tree (Was: linux-next: build warning after merge of the pm tree)
From: Rafael J. Wysocki
Date: Tue Oct 15 2019 - 06:04:14 EST
On Tuesday, October 15, 2019 1:16:50 AM CEST Stephen Rothwell wrote:
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> Hi all,
> On Tue, 15 Oct 2019 10:08:55 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> =
> > After merging the pm tree, today's linux-next build (arm
> > multi_v7_defconfig) produced this warning:
> > In file included from include/linux/irqchip.h:14,
> > from arch/arm/kernel/irq.c:26:
> > include/linux/acpi.h:682:31: warning: 'struct acpi_device' declared insid=
> e parameter list will not be visible outside of this definition or declarat=
> > 682 | acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2=
> , const char *uid2)
> > | ^~~~~~~~~~~
> > and many more.
> > Introduced by commit
> > d1748b57dc88 ("ACPI / utils: Introduce acpi_dev_hid_uid_match() helper")
> > CONFIG_ACPI is not set for this build.
> This became a build failure for the powerpc ppc64_allmodconfig build:
> In file included from include/linux/i2c.h:13,
> from arch/powerpc/platforms/pasemi/misc.c:14:
> include/linux/acpi.h:682:31: error: 'struct acpi_device' declared inside pa=
> rameter list will not be visible outside of this definition or declaration =
> 682 | acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, =
> const char *uid2)
> | ^~~~~~~~~~~
> cc1: all warnings being treated as errors
> (and many more)
> I have used the pm tree from next-20191014 for today.
So this looks weird, because there is an acpi_dev_put() stub in
include/linux/acpi.h too in the same #else block and it takes a
(struct acpi_device *) pointer too and it has not been touched by
the commit in question. So why has it built successfully so far?
Also I wonder why 0-day didn't warn about that commit.
Anyway, I've added an extra declaration of struct acpi_device to the #else
block in question to suppress the warning(s).