As mentioned in android documention, Android 12 should not use debug filesystem in user mode.
I want to build AOSP 12.1 for some device, but building in user mode results to error below:
files are incompatible: Runtime info and framework compatibility matrix are incompatible: No compatible kernel requirement found (kernel FCM version = 5)
for kernel requirement at matrix level 5, for config CONFIG_DEBUG_FS, value=y but required n
This config (CONFIG_DEBUG_FS) isn't my defconfig. I also added CONFIG_DEBUG_FS=n config to defconfig, but no change. result kernel config (obj/KERNEL_OBJ/.config) after build is same (CONFIG_DEBUG_FS=y)
It seems that Android build system uses a base config from host os OR there are some depencencies to this config such that this config is ignored.
How to disable this config in android build system?
I tried "make KCONFIG_CONFIG=arch/arm64/config/vendor/my_defconf menuconfig" so my defconf was input to menuconfig.
I disabled CONFIG_DEBUG_FS by disabling PAGE_OWNER option. because there was a rule that if 3 specific config was set, this config will set automatically.
These caonfigs were PAGE_OWNER && DEBUG_KERNEL && STACKTRACE_SUPPORT.
if all sets then debugfs will set. so I disabled PAGE_OWNER because two others were Mandatory or useful. Then I saved defconfig. such that so many configs changed. and I start to build kernel but too many errors was in result.