linux-kernel - Re: [Git Patch] ACPI: Fix a warning of discarding qualifiers from pointer target type

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Message-ID: <20070822075758.GC1684@ff.dom.local>
Date:	Wed, 22 Aug 2007 09:57:58 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Al Viro <viro@....linux.org.uk>
Cc:	Alexey Starikovskiy <astarikovskiy@...e.de>,
	WANG Cong <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	len.brown@...el.com, Andrew Morton <akpm@...l.org>
Subject: Re: [Git Patch] ACPI: Fix a warning of discarding qualifiers from pointer target type

On Tue, Aug 21, 2007 at 04:18:20PM +0100, Al Viro wrote:
> On Tue, Aug 21, 2007 at 07:14:49PM +0400, Alexey Starikovskiy wrote:
> > WANG Cong wrote:
> > > Fix this warning:
> > >
> > > drivers/acpi/ec.c: In function `acpi_ec_ecdt_probe':
> > > drivers/acpi/ec.c:873: warning: passing arg 1 of `acpi_get_devices' discards qualifiers from pointer target type
> > >
> > > (I don't know whether this fix hits the real problem.)
> > >   
> > It is safe to give acpi_get_devices() const string, as it should not
> > modify it in any condition.
> 
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
> diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
> index ab65b2c..f39fbc6 100644
> --- a/drivers/acpi/namespace/nsxfeval.c
> +++ b/drivers/acpi/namespace/nsxfeval.c
> @@ -540,7 +540,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
>   ******************************************************************************/
>  
>  acpi_status
> -acpi_get_devices(char *HID,
> +acpi_get_devices(const char *HID,
>  		 acpi_walk_callback user_function,
>  		 void *context, void **return_value)
>  {
> diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
> index b5cca5d..3d7ab9e 100644
> --- a/include/acpi/acpixf.h
> +++ b/include/acpi/acpixf.h
> @@ -130,7 +130,7 @@ acpi_walk_namespace(acpi_object_type type,
>  		    void *context, void **return_value);
>  
>  acpi_status
> -acpi_get_devices(char *HID,
> +acpi_get_devices(const char *HID,
>  		 acpi_walk_callback user_function,
>  		 void *context, void **return_value);
>  
> diff --git a/include/acpi/acstruct.h b/include/acpi/acstruct.h
> index aeb4498..8848265 100644
> --- a/include/acpi/acstruct.h
> +++ b/include/acpi/acstruct.h
> @@ -146,7 +146,7 @@ struct acpi_init_walk_info {
>  struct acpi_get_devices_info {
>  	acpi_walk_callback user_function;
>  	void *context;
> -	char *hid;
> +	const char *hid;
>  };
>  
>  union acpi_aml_operands {
> 

So, it looks like this patch (or at least its -mm version) is working.

Now there is 'only' like this (there could be something new, because
I've forgotten to mention this yesterday's log was the second make,
after removing some small testing patch; here it's after make clean;
.config is the same; gcc 3.2.3):

sed: -e expression #1, char 154: Unknown option to 's'
kernel/power/pm.c:205: warning: `pm_register' is deprecated (declared at kernel/power/pm.c:64)
kernel/power/pm.c:205: warning: `pm_register' is deprecated (declared at kernel/power/pm.c:64)
kernel/power/pm.c:206: warning: `pm_send_all' is deprecated (declared at kernel/power/pm.c:180)
kernel/power/pm.c:206: warning: `pm_send_all' is deprecated (declared at kernel/power/pm.c:180)
drivers/pci/search.c: In function `pci_find_slot':
drivers/pci/search.c:99: warning: `pci_find_device' is deprecated (declared at include/linux/pci.h:480)
drivers/pci/search.c: At top level:
drivers/pci/search.c:437: warning: `pci_find_device' is deprecated (declared at drivers/pci/search.c:244)
drivers/pci/search.c:437: warning: `pci_find_device' is deprecated (declared at drivers/pci/search.c:244)
drivers/pci/search.c:438: warning: `pci_find_slot' is deprecated (declared at drivers/pci/search.c:96)
drivers/pci/search.c:438: warning: `pci_find_slot' is deprecated (declared at drivers/pci/search.c:96)
drivers/pci/msi.c:686: warning: weak declaration of `arch_msi_check_device' after first use results in unspecified behavior
drivers/pci/msi.c:698: warning: weak declaration of `arch_setup_msi_irqs' after first use results in unspecified behavior
drivers/pci/msi.c:718: warning: weak declaration of `arch_teardown_msi_irqs' after first use results in unspecified behavior
In file included from drivers/usb/host/ohci-hcd.c:859:
drivers/usb/host/ohci-pci.c: In function `ohci_pci_start':
drivers/usb/host/ohci-pci.c:202: warning: unused variable `pdev'
include/asm/processor.h: In function `native_get_debugreg':
include/asm/processor.h:524: warning: asm operand 0 probably doesn't match constraints
include/asm/processor.h: In function `native_set_debugreg':
include/asm/processor.h:551: warning: asm operand 0 probably doesn't match constraints
Root device is (8, 1)
Setup is 11036 bytes (padded to 11264 bytes).
System is 2428 kB

Cheers,
Jarek P.

PS: does somebody here remember these old good times:
real    56m19.454s
user    53m38.580s
sys     2m7.610s
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