From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Subject: [PATCH bpf-next] xsk: fix 64-bit division Date: Mon, 7 May 2018 19:43:50 +0200 Message-ID: <20180507174350.3534-1-bjorn.topel@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Randy Dunlap , Stephen Rothwell , magnus.karlsson@intel.com, linux-next@vger.kernel.org, linux-kernel@vger.kernel.org To: ast@fb.com, daniel@iogearbox.net, netdev@vger.kernel.org Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Björn Töpel 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: c0c77d8fb787 ("xsk: add user memory registration support sockopt") Signed-off-by: Björn Töpel --- net/xdp/xdp_umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c index 881dfdefe235..2b47a1dd7c6c 100644 --- a/net/xdp/xdp_umem.c +++ b/net/xdp/xdp_umem.c @@ -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; -- 2.14.1