[net 2/7] net/mlx5: IPSec, Fix 64-bit division on 32-bit builds
From: Saeed Mahameed <hidden>
Date: 2017-07-09 12:50:07
Subsystem:
mellanox ethernet driver (mlx5e), mellanox ethernet innova drivers, mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Ilan Tayari <redacted> Fix warnings when building 386 kernel:
quoted
ERROR: "__udivdi3" [drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko] undefined!
Fixes: 2ac9cfe78223 ("net/mlx5e: IPSec, Add Innova IPSec offload TX data path")
Reported-by: kbuild test robot <redacted>
Signed-off-by: Ilan Tayari <redacted>
Signed-off-by: Saeed Mahameed <redacted>
---
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
index 4a78aefdf157..7d06c673851a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c@@ -363,6 +363,7 @@ void mlx5e_ipsec_build_inverse_table(void) { u16 mss_inv; u32 mss; + u64 n; /* Calculate 1/x inverse table for use in GSO data path. * Using this table, we provide the IPSec accelerator with the value of
@@ -372,7 +373,8 @@ void mlx5e_ipsec_build_inverse_table(void) */ mlx5e_ipsec_inverse_table[1] = htons(0xFFFF); for (mss = 2; mss < MAX_LSO_MSS; mss++) { - mss_inv = ((1ULL << 32) / mss) >> 16; + n = 1ULL << 32; + mss_inv = do_div(n, mss) >> 16; mlx5e_ipsec_inverse_table[mss] = htons(mss_inv); } }
--
2.11.0