[openwrt/openwrt] kernel: KERNEL_NET_L3_MASTER_DEV default to y if !SMALL_FLASH

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/2915cfb626367208ada0c91e27529f9516ce1873

commit 2915cfb626367208ada0c91e27529f9516ce1873
Author: Paul Donald <newtwen+github at gmail.com>
AuthorDate: Tue Oct 29 21:49:00 2024 +0100

    kernel: KERNEL_NET_L3_MASTER_DEV default to y if !SMALL_FLASH
    
    Follow-up for 45d541bb409355f090b971d96ebebd8610ef84a7
    
    This change allows features such as kmod-vrf
    
    ```
    KERNEL_NET_L3_MASTER_DEV=n
    
    x86_64 generic
            bzImage 6,927,360 bytes
    aarch64 coretex-a53
            kernel  4,268,836 bytes
    
    KERNEL_NET_L3_MASTER_DEV=y
    
    x86_64 generic
            bzImage 6,931,456 bytes
    aarch64 coretex-a53
            kernel  4,273,042 bytes
    
    Delta:
    x86_64 generic
            +4096 bytes
    aarch64 coretex-a53
            +4206 bytes
    
    x86_64 generic vrf.ko - 258,792 bytes
    aarch64 coretex-a53 vrf.ko - 263,632 bytes
    ```
    
    See:
    https://forum.openwrt.org/t/vrf-support-testing-out-evpn-at-home/181108
    https://forum.openwrt.org/t/please-enable-net-l3-master-dev-in-kernel-build-by-default/201825
    
    Signed-off-by: Paul Donald <newtwen+github at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/16819
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 config/Config-kernel.in | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 43ed9eaf36..0fa039db40 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -1187,9 +1187,11 @@ endif
 
 config KERNEL_NET_L3_MASTER_DEV
 	bool "L3 Master device support"
+	default y if !SMALL_FLASH
 	help
 	  This module provides glue between core networking code and device
 	  drivers to support L3 master devices like VRF.
+  	  Increases the compressed kernel size by ~4kB (as of Linux 6.6).
 
 config KERNEL_XDP_SOCKETS
 	bool "XDP sockets support"