[dpdk-dev] [PATCH v4 0/4] compatibility fallback and replacement of kernel function invoking

[Jincheng Miao <jmiao@redhat.com>]

The related kernel function is:
- pci_num_vf, it is introduced from upstream linux-2.6.34. For RHEL-based
kernel, it is defined from RHEL5.9.

- kstrtoul, this function is united kernel API to replace strict_strtoul in
the furture. It is introduced from linux-2.6.39. For RHEL6, it is defined
from RHEL6.4.

This patchset do some compatiblity work for these two functions, and
replace strict_strtoul which is depleted from linux-3.18.

Some test results for dpdk-1.8.0-rc3 with this patchset:
1. In RHEL7 GA: Build success after specify -mssse3 to CFLAGS,
```
CC ixgbe_rxtx_vec.o
In file included from /root/dpdk-source/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c:41:0:
/usr/lib/gcc/x86_64-redhat-linux/4.8.2/include/tmmintrin.h:31:3: error: #error "SSSE3 instruction set not enabled"
# error "SSSE3 instruction set not enabled"
```
  - for igb_uio, pass
  - for kni, pass
  - for xen_dom0, pass


2. In RHEL6.5 : Build fails for kni, and xen_dom0:
  - for igb_uio: pass
  - for kni: fail, the log is:
```
CC [M] /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.o
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_sock_poll’:
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:222: error: ‘struct socket’ has no member named ‘wq’
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_chk_vhost_rx’:
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:313: error: implicit declaration of function ‘sk_sleep’
cc1: warnings being treated as errors
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:313: error: passing argument 1 of ‘__wake_up’ makes pointer from integer without a cast
include/linux/wait.h:146: note: expected ‘struct wait_queue_head_t *’ but argument is of type ‘int’
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_sk_write_space’:
/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:580: error: assignment makes pointer from integer without a cast
make[8]: *** [/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.o] Error 1
```
  - for xen_dom0: fail, seems xen is not offical supported in RHEL6.

v4:
  Indent for patches.
  Include compat.h for kni_vhost.c

v3:
  Adjust pci_num_vf() introduced RHEL version number.
  Seperate "replace strict_strtoul with kstrtoul" into 3 patches for igb_uio,
kni, and xen_dom0. Add compat.h in kni and xen_dom0 for compatible with
older kernels.

v2:
  Merge these two patch in one patchset.
  Compatible with old kernel for kstrtoul.
  Compatible with RHEL6 for pci_num_vf.


Jincheng Miao (4):
  igb_uio: compatible with upstream longterm kernel and RHEL
  igb_uio: replace strict_strtoul with kstrtoul
  kni: replace strict_strtoul with kstrtoul
  xen_dom0: replace strict_strtoul with kstrtoul

 lib/librte_eal/linuxapp/igb_uio/compat.h        | 11 ++++++++++-
 lib/librte_eal/linuxapp/igb_uio/igb_uio.c       |  4 ++--
 lib/librte_eal/linuxapp/kni/compat.h            | 16 ++++++++++++++++
 lib/librte_eal/linuxapp/kni/kni_vhost.c         |  3 ++-
 lib/librte_eal/linuxapp/xen_dom0/compat.h       | 16 ++++++++++++++++
 lib/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c |  2 +-
 6 files changed, 47 insertions(+), 5 deletions(-)
 create mode 100644 lib/librte_eal/linuxapp/kni/compat.h
 create mode 100644 lib/librte_eal/linuxapp/xen_dom0/compat.h

-- 
1.8.3.1