| Message ID | 1384177236-8371-1-git-send-email-mmarek@suse.cz (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
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." That way, the changelog is hopefully more clear. Michal -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Nov 12, 2013 at 1:40 AM, Michal Marek <mmarek@suse.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 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> What's LTO? I guess it's Link Time Optimization? Is there any Yes. Link Time Optimization with modern gcc. > documentation about how it works or how to use it? It's still a separate tree, but bits'n'pieces are slowly making it into the kernel. https://github.com/andikleen/linux-misc/tree/lto-3.12 https://github.com/andikleen/linux-misc/blob/5a18e33264321b01816a220ab14207a5f26ae16e/Documentation/lto-build http://halobates.de/kernel-lto.pdf -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Nov 11, 2013 at 6:40 AM, Michal Marek <mmarek@suse.cz> 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 > (nearly) unique symbol names. > > Reported-by: Joe Mario <jmario@redhat.com> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: linux-pci@vger.kernel.org > Cc: Andi Kleen <ak@linux.intel.com> > Cc: Joe Mario <jmario@redhat.com> > Signed-off-by: Michal Marek <mmarek@suse.cz> Applied to my for-linus branch for v3.13, thanks. > --- > include/linux/pci.h | 30 +++++++++++++++--------------- > 1 file changed, 15 insertions(+), 15 deletions(-) > > diff --git a/include/linux/pci.h b/include/linux/pci.h > index da172f9..1ff4dec 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -1557,65 +1557,65 @@ enum pci_fixup_pass { > /* Anonymous variables would be nice... */ > #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ > class_shift, hook) \ > - static const struct pci_fixup __pci_fixup_##name __used \ > + static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \ > __attribute__((__section__(#section), aligned((sizeof(void *))))) \ > = { vendor, device, class, class_shift, hook }; > > #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ > - vendor##device##hook, vendor, device, class, class_shift, hook) > + hook, vendor, device, class, class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ > - vendor##device##hook, vendor, device, class, class_shift, hook) > + hook, vendor, device, class, class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ > - vendor##device##hook, vendor, device, class, class_shift, hook) > + hook, vendor, device, class, class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ > - vendor##device##hook, vendor, device, class, class_shift, hook) > + hook, vendor, device, class, class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ > - resume##vendor##device##hook, vendor, device, class, \ > + resume##hook, vendor, device, class, \ > class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ > - resume_early##vendor##device##hook, vendor, device, \ > + resume_early##hook, vendor, device, \ > class, class_shift, hook) > #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \ > class_shift, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ > - suspend##vendor##device##hook, vendor, device, class, \ > + suspend##hook, vendor, device, class, \ > class_shift, hook) > > #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ > - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) > + hook, vendor, device, PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ > - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) > + hook, vendor, device, PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ > - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) > + hook, vendor, device, PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ > - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) > + hook, vendor, device, PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ > - resume##vendor##device##hook, vendor, device, \ > + resume##hook, vendor, device, \ > PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ > - resume_early##vendor##device##hook, vendor, device, \ > + resume_early##hook, vendor, device, \ > PCI_ANY_ID, 0, hook) > #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ > DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ > - suspend##vendor##device##hook, vendor, device, \ > + suspend##hook, vendor, device, \ > PCI_ANY_ID, 0, hook) > > #ifdef CONFIG_PCI_QUIRKS > -- > 1.8.1.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/linux/pci.h b/include/linux/pci.h index da172f9..1ff4dec 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1557,65 +1557,65 @@ enum pci_fixup_pass { /* Anonymous variables would be nice... */ #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ class_shift, hook) \ - static const struct pci_fixup __pci_fixup_##name __used \ + static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \ __attribute__((__section__(#section), aligned((sizeof(void *))))) \ = { vendor, device, class, class_shift, hook }; #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ - vendor##device##hook, vendor, device, class, class_shift, hook) + hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ - vendor##device##hook, vendor, device, class, class_shift, hook) + hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ - vendor##device##hook, vendor, device, class, class_shift, hook) + hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ - vendor##device##hook, vendor, device, class, class_shift, hook) + hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ - resume##vendor##device##hook, vendor, device, class, \ + resume##hook, vendor, device, class, \ class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ - resume_early##vendor##device##hook, vendor, device, \ + resume_early##hook, vendor, device, \ class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ - suspend##vendor##device##hook, vendor, device, class, \ + suspend##hook, vendor, device, class, \ class_shift, hook) #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) + hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) + hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) + hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ - vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) + hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ - resume##vendor##device##hook, vendor, device, \ + resume##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ - resume_early##vendor##device##hook, vendor, device, \ + resume_early##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ - suspend##vendor##device##hook, vendor, device, \ + suspend##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #ifdef CONFIG_PCI_QUIRKS
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 (nearly) unique symbol names. Reported-by: Joe Mario <jmario@redhat.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-pci@vger.kernel.org Cc: Andi Kleen <ak@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Signed-off-by: Michal Marek <mmarek@suse.cz> --- include/linux/pci.h | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-)