linux-kernel - Re: [PATCH 1/2] PCI: Do not use PCI ID macros in quirk names

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Message-ID: <CAErSpo6sCvDuSA3Bw0LY7D6QYC=xhPP05f966kjDP0mvqu5wEg@mail.gmail.com>
Date:	Mon, 25 Nov 2013 15:18:42 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Michal Marek <mmarek@...e.cz>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>, Joe Mario <jmario@...hat.com>
Subject: Re: [PATCH 1/2] PCI: Do not use PCI ID macros in quirk names

On Tue, Nov 12, 2013 at 1:40 AM, Michal Marek <mmarek@...e.cz> wrote:
> On 11.11.2013 14:40, Michal Marek wrote:
>> Pasting the verbatim PCI_(VENDOR|DEVICE)_* macros in the __pci_fixup_*
>> symbol names results in insanely long names such as
>>
>> __pci_fixup_resumePCI_VENDOR_ID_SERVERWORKSPCI_DEVICE_ID_SERVERWORKS_HT1000SBquirk_disable_broadcom_boot_interrupt
>>
>> When LTO adds its numeric suffix to such symbol, it overflows the
>> namebuf[KSYM_NAME_LEN] array. Use the line number instead to create
>
> "... the namebuf[KSYM_NAME_LEN] array in kernel/kallsyms.c."

What's LTO?  I guess it's Link Time Optimization?  Is there any
documentation about how it works or how to use it?

Bjorn
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