[LTP] [PATCH V2 5/6] syscalls: Don't pass struct timespec to tst_syscall()

[Cyril Hrubis]

Hi!
> > This is not enough to run on old kernels that have __NR_clock_getres
> > but don't have __NR_clock_getres_time64,
> 
> What about reversing the order of the two ? Check __NR_clock_getres
> first ?

Moreover the __NR_ constants are always defined in order to avoid need
for excessive #ifdefs and the missing syscalls are defined to -1 in LTP.

So this will not work at all.

> > you need a runtime fallback
> > instead of a compile-time fallback.
> 
> Why so ?

Given that 32bit syscalls can be disabled in kernel config we cannot
really tell which ones are supported before we attempt to call the
syscall.

-- 
Cyril Hrubis
chrubis@suse.cz