Re: [PATCH v2 01/20] net: add helper eth_addr_add()
From: Randy Dunlap <hidden>
Date: 2022-09-01 23:23:08
Also in:
linux-devicetree, lkml
On 9/1/22 15:18, Michael Walle wrote:
quoted hunk ↗ jump to hunk
Add a helper to add an offset to a ethernet address. This comes in handy if you have a base ethernet address for multiple interfaces. Signed-off-by: Michael Walle <redacted> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Jakub Kicinski <kuba@kernel.org> --- changes since v1: - none include/linux/etherdevice.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index a541f0c4f146..f144cadbe99d 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h@@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) u64_to_ether_addr(u, addr); } +/** + * eth_addr_add() - Add (or subtract) and offset to/from the given MAC address.
an offset
?
+ *
+ * @offset: Offset to add.
+ * @addr: Pointer to a six-byte array containing Ethernet address to increment.
+ */
+static inline void eth_addr_add(u8 *addr, long offset)
+{
+ u64 u = ether_addr_to_u64(addr);
+
+ u += offset;
+ u64_to_ether_addr(u, addr);
+}
+
/**
* is_etherdev_addr - Tell if given Ethernet address belongs to the device.
* @dev: Pointer to a device structure-- ~Randy _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel