[dpdk-dev] [PATCH] igb_uio: fix build for longterm kernel 2.6.32.63
Thomas Monjalon
thomas.monjalon at 6wind.com
Fri Oct 31 09:53:10 CET 2014
Hi Jincheng,
2014-10-31 09:54, Jincheng Miao:
> This patch will make RHEL6 build failed.
>
> The root cause is that RHEL-based kernel is slightly different with
> upstream kernel.
> It has some functions (pci_num_vf, kstrtoul, etc) which don't exist in
> upstream longterm kernel.
Yes it seems that the functions are stub-defined in RHEL if CONFIG_PCI_IOV
is not defined.
> For better compatibility, IMHO it is distinguishing RHEL-based kernel
> and upstream one.
Yes we have to handle the RedHat difference.
> Using macro like:
> ```
> #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
> !(defined(RHEL_RELEASE_CODE) && RHEL_RELEASE_CODE >=
> RHEL_RELEASE_VERSION(6, 3))
>
> static int pci_num_vf(struct pci_dev *dev)
> {
> ```
>
> But this is RHEL-specified fix. For other distros, if they have some
> problem, we should hack it in the same way.
>
> Thanks and regards,
> Jincheng Miao
>
>
> On 10/30/2014 04:18 PM, Jincheng Miao wrote:
> > There is a logical error in igb_uio/compat.h when define pci_num_vf().
> > Only CONFIG_PCI_IOV enabled, this function could be defined.
> >
> > This patch fix the following error for linux-2.6.32.63:
> > CC [M] /root/dpdk-source/build/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.o
> > /root/dpdk-source/build/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.c: In function ‘show_max_vfs’:
> > /root/dpdk-source/build/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.c:75: error: implicit declaration of function ‘pci_num_vf’
> >
> > Signed-off-by: Jincheng Miao <jmiao at redhat.com>
> > ---
> > lib/librte_eal/linuxapp/igb_uio/compat.h | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
> > index 676fa1b..0af0cae 100644
> > --- a/lib/librte_eal/linuxapp/igb_uio/compat.h
> > +++ b/lib/librte_eal/linuxapp/igb_uio/compat.h
> > @@ -21,7 +21,7 @@
> > #endif
> >
> > #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
> > - !defined(CONFIG_PCI_IOV)
> > + defined(CONFIG_PCI_IOV)
> >
> > static int pci_num_vf(struct pci_dev *dev)
> > {
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