On 20/01/2023 15:57, Russell King (Oracle) wrote: > On Fri, Jan 20, 2023 at 12:35:41PM +0100, Krzysztof Kozlowski wrote: >> Defconfig=y is only for critical stuff needed to bring initramfs. Time >> is not needed for initramfs. > > Are I2C drivers "critical stuff"? What about AHCI drivers? What about > all the USB HCI drivers? USB Storage can certainly be loaded from an > initramfs, yet it's =y. LED triggers? Loads of RTC drivers that are > marked as =y? XOR drivers? VIRTIO drivers? Filesystems? I seem to > remember Red Hat sets even popular filesystems to be a module in their > kernel. Almost all your answers above - these should be =m. USB not always, because it is used for USB Ethernet adapters which is used for network boot (although even then initramfs comes with actual drivers...) > > Clearly, "defconfig=y is only for critical stuff" is rather false in > practice, and I suspect is little more than a desire rather than a > rule. I suspect it's more "defconfig=y is for stuff that makes most > platforms successfully boot without an initramfs". Yes, that's true, although there was already pushback against this. Having an initramfs is not a big deal and nowadays I think all new ARMv8 platforms use it. Anyway this talk here is about RTC which is not needed at all as built in. Best regards, Krzysztof
