On Fri, Nov 08, 2019 at 10:12:22PM +0100, Arnd Bergmann wrote:
At the moment, the compilation of the old time32 system calls depends purely on the architecture. As systems with new libc based on 64-bit time_t are getting deployed, even architectures that previously supported these (notably x86-32 and arm32 but also many others) no longer depend on them, and removing them from a kernel image results in a smaller kernel binary, the same way we can leave out many other optional system calls.
More importantly, on an embedded system that needs to keep working beyond year 2038, any user space program calling these system calls is likely a bug, so removing them from the kernel image does provide an extra debugging help for finding broken applications.
I've gone back and forth on hiding this option unless CONFIG_EXPERT is set. This version leaves it visible based on the logic that eventually it will be turned off indefinitely.
Signed-off-by: Arnd Bergmann firstname.lastname@example.org
Acked-by: Christian Brauner email@example.com