Hi, After my attempt getting Linux 4.19 working for the Octeon target I started to look at the generic configuration for 4.19 and it seems that there are quite a bit of target specific options listed and potentially generating larger kernels than necessary. Given that some options are incorrect for certain targets I assume that they get overridden and/or ignored. Unless I misunderstand how the Linux kernel configuration works =y is equivalent to always compiled into kernel?
I'm taking about this file by the way: https://github.com/openwrt/openwrt/blob/master/target/linux/generic/config-4.19 Should be set by target? Shouldn't coexist with CONFIG_64BIT as far as I can tell. CONFIG_32BIT=y ARM specific, should be set by target? CONFIG_ARM_CPU_TOPOLOGY=y CONFIG_ARM_DMA_MEM_BUFFERABLE=y CONFIG_ARM_GIC_MAX_NR=1 Target specific, no need to have it enabled by default and/or possibly at all? CONFIG_ATA_BMDMA=y CONFIG_ATA_SFF=y Seems to be defined by default? CONFIG_BLK_DEV_LOOP_MIN_COUNT=8 https://github.com/torvalds/linux/blob/master/drivers/block/Kconfig#L217 Should be set by target? CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3 Debug option - Adds unnecessary overhead? CONFIG_BRANCH_PROFILE_NONE=y https://cateee.net/lkddb/web-lkddb/BRANCH_PROFILE_NONE.html Should be set by target (ARM)? CONFIG_CACHE_L2X0_PMU=y Should be set by target, why is it enabled in 2019? CONFIG_CARDBUS=y Should be set by target (seems x86/64x specific)? CONFIG_DOUBLEFAULT=y Gets defined automatically based on target/platform? CONFIG_HZ=100 CONFIG_HZ_100=y Already default? CONFIG_IIO_CONSUMERS_PER_TRIGGER=2 https://cateee.net/lkddb/web-lkddb/IIO_CONSUMERS_PER_TRIGGER.html Why? CONFIG_ISDN=y CONFIG_JOLIET=y Should be set by target (ARM)? CONFIG_KERNEL_MODE_NEON=y Set Page_Size by target? CONFIG_PAGE_SIZE_4KB=y CONFIG_PPC_4K_PAGES=y Already default? CONFIG_PWRSEQ_EMMC=y https://cateee.net/lkddb/web-lkddb/PWRSEQ_EMMC.html Default 21 isn't enough? CONFIG_RCU_CPU_STALL_TIMEOUT=60 Needed for? CONFIG_RXKAD=y Obsolete? CONFIG_SLABINFO=y Shouldn't be default and/or platform specific? CONFIG_SND_X86=y Needed for? CONFIG_USB_ARMLINUX=y CONFIG_USB_BELKIN=y Platform specific? CONFIG_USB_OHCI_LITTLE_ENDIAN=y Platform specific? CONFIG_X86_SYSFB=y Best regads, Daniel _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
