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Date:   Thu, 13 Aug 2020 15:14:32 -0500
From:   Bjorn Helgaas <helgaas@kernel.org>
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        linux-pci <linux-pci@vger.kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>, jsbarnes@google.com,
        Arjan van de Ven <arjan@linux.intel.com>,
        Len Brown <lenb@kernel.org>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH] x86/pci: fix intel_mid_pci.c build error when ACPI is
 not enabled
Message-ID: <20200813201432.GA1185885@bjorn-Precision-5520>
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[+cc Andy]

On Thu, Aug 13, 2020 at 12:58:38PM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@infradead.org>
> 
> Fix build error when CONFIG_ACPI is not set/enabled by adding
> the header file <asm/acpi.h> which contains a stub for the function
> in the build error.
> 
> ../arch/x86/pci/intel_mid_pci.c: In function ‘intel_mid_pci_init’:
> ../arch/x86/pci/intel_mid_pci.c:303:2: error: implicit declaration of function ‘acpi_noirq_set’; did you mean ‘acpi_irq_get’? [-Werror=implicit-function-declaration]
>   acpi_noirq_set();

Fixes: a912a7584ec3 ("x86/platform/intel-mid: Move PCI initialization to arch_init()")

Possibly
Cc: stable@vger.kernel.org	# v4.16+

> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
> Cc: Len Brown <lenb@kernel.org>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: Jesse Barnes <jsbarnes@google.com>
> Cc: Arjan van de Ven <arjan@linux.intel.com>
> Cc: linux-pci@vger.kernel.org
> ---
> Found in linux-next, but applies to/exists in mainline also.
> 
> Alternative.1: X86_INTEL_MID depends on ACPI
> Alternative.2: drop X86_INTEL_MID support
> 
>  arch/x86/pci/intel_mid_pci.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- linux-next-20200813.orig/arch/x86/pci/intel_mid_pci.c
> +++ linux-next-20200813/arch/x86/pci/intel_mid_pci.c
> @@ -33,6 +33,7 @@
>  #include <asm/hw_irq.h>
>  #include <asm/io_apic.h>
>  #include <asm/intel-mid.h>
> +#include <asm/acpi.h>
>  
>  #define PCIE_CAP_OFFSET	0x100
>  
>