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kconfigcheck: require NULL_TTY support (MR 6087)

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The null TTY driver provides a proper (dummy) TTY interface when
console=null is set on the kernel cmdline. This fixes certain
applications which don't correctly handle read() immediately returning
with 0 bytes (e.g. busybox syslogd).

Most normal EFI devices don't boot with console=null and as such there
are various foot-guns littered all over Linux userspace and even in our
own initramfs. However some android devices even enforce console=null,
so it's something we have to deal with.

NULL_TTY should reduce the chance of folks running into strange problems
because of this.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
This commit is contained in:
Caleb Connolly 2025-01-08 21:02:22 +01:00 • committed by Pablo Correa Gómez
parent 9948d6e3af
commit e9252bb7db
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kconfigcheck.toml
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@ -73,6 +73,10 @@ SAMSUNG_TUI = false
TZDEV = false
["category:default"."<5.2.0"."armhf armv7 x86"]
LBDAF = true
["category:default".">=5.2.0"."all"]
# Provide a proper dummy null console to improve compatibility
# on devices that like to coerce console=null
NULL_TTY = true
["category:default".">=5.19.0"."all"]
FW_LOADER_COMPRESS_ZSTD = true