tree 6d94625d00a319d89fc8b9b6be6fd606a2c9a1d0
parent 819671ff849b07b9831b91de879ddc5da4b333d4
author Dominik Brodowski <linux@dominikbrodowski.net> 1520764466 +0100
committer Dominik Brodowski <linux@dominikbrodowski.net> 1522692891 +0200

kernel: use kernel_wait4() instead of sys_wait4()

All call sites of sys_wait4() set *rusage to NULL. Therefore, there is
no need for the copy_to_user() handling of *rusage, and we can use
kernel_wait4() directly.

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net

Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>