Re: [PATCH RFC v3 02/10] sched_getattr: port to copy_struct_to_user

* Aleksa Sarai:

sched_getattr(2) doesn't care about trailing non-zero bytes in the (ksize > usize) case, so just use copy_struct_to_user() without checking ignored_trailing.

I think this is what causes glibc's misc/tst-sched_setattr test to fail on recent kernels. The previous non-modifying behavior was documented in the manual page:

If the caller-provided attr buffer is larger than the kernel's sched_attr structure, the additional bytes in the user-space structure are not touched.

I can just drop this part of the test if the kernel deems both behaviors valid.

Thanks, Florian