diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:26 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:14:51 +0200 |
| commit | d300b610812f3c10d146db4c18f98eba38834c70 (patch) | |
| tree | 6d94625d00a319d89fc8b9b6be6fd606a2c9a1d0 /kernel/pid_namespace.c | |
| parent | syscalls: define and explain goal to not call syscalls in the kernel (diff) | |
| download | linux-d300b610812f3c10d146db4c18f98eba38834c70.tar.xz linux-d300b610812f3c10d146db4c18f98eba38834c70.zip | |
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>
Diffstat (limited to 'kernel/pid_namespace.c')
| -rw-r--r-- | kernel/pid_namespace.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index 0b53eef7d34b..93b57f026688 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -242,16 +242,16 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns) /* * Reap the EXIT_ZOMBIE children we had before we ignored SIGCHLD. - * sys_wait4() will also block until our children traced from the + * kernel_wait4() will also block until our children traced from the * parent namespace are detached and become EXIT_DEAD. */ do { clear_thread_flag(TIF_SIGPENDING); - rc = sys_wait4(-1, NULL, __WALL, NULL); + rc = kernel_wait4(-1, NULL, __WALL, NULL); } while (rc != -ECHILD); /* - * sys_wait4() above can't reap the EXIT_DEAD children but we do not + * kernel_wait4() above can't reap the EXIT_DEAD children but we do not * really care, we could reparent them to the global init. We could * exit and reap ->child_reaper even if it is not the last thread in * this pid_ns, free_pid(pid_allocated == 0) calls proc_cleanup_work(), |