I decided against using LEGACY_TIME_SYSCALLS to conditionally compile legacy time syscalls such as sys_nanosleep because this will need to enclose compat_sys_nanosleep as well. So, defining it as
config LEGACY_TIME_SYSCALLS def_bool 64BIT || !64BIT_TIME
will not include compat_sys_nanosleep. We will instead need a new config to exclusively mark legacy syscalls.
Do you mean we would need to do this separately for native and compat syscalls, and have yet another option, like LEGACY_TIME_SYSCALLS and LEGACY_TIME_COMPAT_SYSCALLS, to cover all cases? I would think that CONFIG_COMPAT_32BIT_TIME handles all the compat versions, while CONFIG_LEGACY_TIME_SYSCALLS handles all the native ones.
I meant sys_nanosleep would be covered by LEGACY_TIME_SYSCALLS, but compat_sys_nanosleep would be covered by CONFIG_COMPAT_32BIT_TIME along with other compat syscalls. So, if we define the LEGACY_TIME_SYSCALLS as
"This controls the compilation of the following system calls: time, stime, gettimeofday, settimeofday, adjtimex, nanosleep, alarm, getitimer, setitimer, select, utime, utimes, futimesat, and {old,new}{l,f,}stat{,64}. These all pass 32-bit time_t arguments on 32-bit architectures and are replaced by other interfaces (e.g. posix timers and clocks, statx). C libraries implementing 64-bit time_t in 32-bit architectures have to implement the handles by wrapping around the newer interfaces. New architectures should not explicitly enable this."
This would not be really true as compat interfaces have nothing to do with this config.
I was proposing that we could have LEGACY_TIME_SYSCALLS config, but then have all these "deprecated" syscalls be enclosed within this, compat or not. This will also mean that we will have to come up representing these syscalls in the syscall header files. This can be a separate patch and this series can be merged as is if everyone agrees.
-Deepa