Commit ea7e3435 authored May 07, 2018 by Björn Töpel Committed by Daniel Borkmann May 09, 2018

xsk: fix 64-bit division



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: c0c77d8f ("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>

parent a46a5c1a

net/xdp/xdp_umem.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;