linux-kernel - Re: [PATCH 2/3] x86: remove duplicated parser for "pci=noacpi"

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Date:	Thu, 07 Dec 2006 05:23:47 +0000
From:	Sergio Monteiro Basto <sergio@...giomb.no-ip.org>
To:	Yinghai Lu <yinghai.lu@....com>
Cc:	Andrew Morton <akpm@...l.org>, Andi Kleen <ak@....de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] x86: remove duplicated parser for "pci=noacpi"

On Sun, 2006-11-26 at 15:23 -0800, Yinghai Lu wrote:
[PATCH 2/3] x86: remove duplicated parser for "pci=noacpi" 

Remove "pci=noacpi" parse in acpi/boot.c, because it is duplicated 
with that in pci/common.c.

Signed-off-by: Yinghai Lu <yinghai.lu@....com>

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index d12fb97..6d62dd1 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -1285,15 +1293,6 @@ static int __init parse_acpi(char *arg)
 }
 early_param("acpi", parse_acpi);
 
-/* FIXME: Using pci= for an ACPI parameter is a travesty. */
-static int __init parse_pci(char *arg)
-{
-       if (arg && strcmp(arg, "noacpi") == 0)
-               acpi_disable_pci();
-       return 0;
-}
-early_param("pci", parse_pci);
-
 #ifdef CONFIG_X86_IO_APIC
 static int __init parse_acpi_skip_timer_override(char *arg)
 {
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index cdfcf97..6d5b70a 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -294,7 +294,7 @@ char * __devinit  pcibios_setup(char *str)
        }
 #endif
        else if (!strcmp(str, "noacpi")) {
-               acpi_noirq_set();
+               acpi_disable_pci();
                return NULL;
        }
        else if (!strcmp(str, "noearly")) {


/include/asm-x86_64/acpi.h (and asm-i386)
acpi_disable_pci : 

#ifdef CONFIG_ACPI
static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
static inline void acpi_disable_pci(void)
{
    acpi_pci_disabled = 1;
    acpi_noirq_set();
}
#else   /* !CONFIG_ACPI */
#define acpi_ioapic 0
static inline void acpi_noirq_set(void) { }
static inline void acpi_disable_pci(void) { }

so first hunk of the patch doesn't have nothing in common with second ,
and it is different disable acpi_irqs than disable all acpi,
callacpi_disable_pci () is acpi=off.

My main goal when I read this mail was delete acpi=noirq or pci=noacpi
because is a redundant boot option which just make confusions.  

I have to go (sleep) 

Thanks,

-- 
Sérgio M.B.

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