linux-kernel - Re: 2.6.23-rc3-git3 make warnings

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Date:	Wed, 22 Aug 2007 00:17:23 +0800
From:	WANG Cong <xiyou.wangcong@...il.com>
To:	Jarek Poplawski <jarkao2@...pl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc3-git3 make warnings

On Tue, Aug 21, 2007 at 03:20:38PM +0200, Jarek Poplawski wrote:
>Here are some more of, probably well-known, warnings with attached
>testing-only .config.
>
>Regards,
>Jarek P.
>
>
>sed: -e expression #1, char 154: Unknown option to 's'
>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
>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'
				^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This warning is suspicious. In fact, 'pdev' is used when CONFIG_PM is defined.
See the following:

<snip>
                if (device_may_wakeup(&pdev->dev))
                        ohci->hc_control |= OHCI_CTRL_RWC;
<snip>

Or a bug of gcc?

-- 
_   /|
\'o.O'
=(___)=
   U    ack!
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