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xsk: fix 64-bit division

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i386 builds report:
  net/xdp/xdp_umem.o: In function `xdp_umem_reg':
  xdp_umem.c:(.text+0x47e): undefined reference to `__udivdi3'

This fix uses div_u64 instead of the GCC built-in.

Fixes: c0c77d8fb7 ("xsk: add user memory registration support sockopt")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Björn Töpel 2018-05-07 19:43:50 +02:00 committed by Daniel Borkmann
parent a46a5c1a43
commit ea7e343529
1 changed files with 1 additions and 1 deletions
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net/xdp/xdp_umem.c
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@ -209,7 +209,7 @@ int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
if ((addr + size) < addr)
return -EINVAL;
nframes = size / frame_size;
nframes = (unsigned int)div_u64(size, frame_size);
if (nframes == 0 || nframes > UINT_MAX)
return -EINVAL;