tree 6dcdf27d851b4c9e50f689611a26f1dfc10ebef0
parent 7e95a225901a5d2fd140f14b4302805cecc22da7
author Al Viro <viro@zeniv.linux.org.uk> 1494807902 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1495386660 -0400

wait4(2)/waitid(2): separate copying rusage to userland

New helpers: kernel_waitid() and kernel_wait4().  sys_waitid(),
sys_wait4() and their compat variants switched to those.  Copying
struct rusage to userland is left to syscall itself.  For
compat_sys_wait4() that eliminates the use of set_fs() completely.
For compat_sys_waitid() it's still needed (for siginfo handling);
that will change shortly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>