[LTP] [PATCH v2 4/6] direct_io: diotest4: use getpagesize() for mmap if shm header is absent

[Jan Stancek]

----- Original Message -----
> For some architectures, mmap(MAP_FIXED) has to be aligned to SHMLBA
> (instead of getpagesize()) --
> 
>    https://sourceforge.net/p/ltp/mailman/ltp-list/?viewmonth=200804
> 
> This dependency on SHMLBA causes the test to fail building for Android
> due to absence of sys/shm.h. Make the header dependency configurable and
> use getpagesize() as mmap granularity if the header is absent allowing
> the test to work on Android while not breaking the architectures that
> depend on the shm headers.
> 
> Signed-off-by: Sandeep Patil <sspatil@google.com>
> ---
> v1->v2
> ------
> - Instead of relying on __BIONIC__, fix by doing a header check for <sys/shm>
> and
>   if the header doesn't exist, use getpagesize() as mmap granularity,
>   otherwise
>   use SHMBA (as before)

Pushed.

Thanks,
Jan