From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 23 Feb 2018 14:15:31 +0100
Subject: mlxsw: spectrum_kvdl: use div_u64() for 64-bit division
Patch-mainline: v4.17-rc1
Git-commit: b89c7695b14f58686ac89d5add861f1f6d3fd4da
References: bsc#1112374

Calculating the number of entries now uses 64-bit arithmetic that
causes a link error on 32-bit architectures:

drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.o: In function `mlxsw_sp_kvdl_init':
spectrum_kvdl.c:(.text+0x51c): undefined reference to `__aeabi_uldivmod'

We could probably use a 32-bit division here as before, but since this is
not in a performance critical path, div_u64() seems cleaner here.

Fixes: 887839e6960d ("mlxsw: spectrum_kvdl: Add support for dynamic partition set")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
@@ -278,7 +278,7 @@ static int mlxsw_sp_kvdl_part_init(struc
 		resource_size = info->end_index - info->start_index + 1;
 	}
 
-	nr_entries = resource_size / info->alloc_size;
+	nr_entries = div_u64(resource_size, info->alloc_size);
 	usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long);
 	part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL);
 	if (!part)