This patchset contains several improvements for af_xdp socket umem
mappings for 32bit systems. Also, there is one more patch outside of
this series that on linux-next tree and related to mmap2 af_xdp umem
offsets: "mm: mmap: increase sockets maximum memory size pgoff for 32bits"

Based on bpf-next/master


        - replaced "libbpf: add asm/unistd.h to xsk to get __NR_mmap2" on
         "libbpf: use LFS (_FILE_OFFSET_BITS) instead of direct mmap2
        - use vmap along with page_address to avoid overkill
        - define mmap syscall trace5 for mmap if defined

Ivan Khoronzhuk (3):
  libbpf: use LFS (_FILE_OFFSET_BITS) instead of direct mmap2 syscall
  xdp: xdp_umem: replace kmap on vmap for umem map
  samples: bpf: syscal_nrs: use mmap2 if defined

 net/xdp/xdp_umem.c         | 36 +++++++++++++++++++++++-----
 samples/bpf/syscall_nrs.c  |  6 +++++
 samples/bpf/tracex5_kern.c | 13 ++++++++++
 tools/lib/bpf/Makefile     |  1 +
 tools/lib/bpf/xsk.c        | 49 +++++++++++---------------------------
 5 files changed, 64 insertions(+), 41 deletions(-)


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