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4ec80cd907
1. KCFLAGS should be used for custom flags 2. Optimization flags are arch / SoC specific 3. -fno-reorder-blocks may *worsen* network performace on some SoCs 4. Usage of flags was *reversed* since 5.4 and noone reported that If we really need custom flags then CONFIG_KERNEL_CFLAGS should get default value adjusted properly (per target). Ref: 4e0c54bc5bc8 ("kernel: add support for kernel 5.4") Link: http://lists.openwrt.org/pipermail/openwrt-devel/2022-June/038853.html Link: https://patchwork.ozlabs.org/project/openwrt/patch/20190409093046.13401-1-zajec5@gmail.com/ Cc: Felix Fietkau <nbd@nbd.name> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: Rui Salvaterra <rsalvaterra@gmail.com> Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 22168ae68101b95d03741b0e9e8ad20b8a5ae5b7)