[PATCH 2/2] wait: allow sys_waitid() to accept WNOTHREAD/WCLONE/__WALL

From	Oleg Nesterov <oleg@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 2/2] wait: allow sys_waitid() to accept __WNOTHREAD/__WCLONE/__WALL
Date	2016-03-16 00:40 +0100
Message-ID	<rd6Je-EH-63@gated-at.bofh.it> (permalink)
References	<rd6Jb-EH-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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I see no reason why waitid() can't support other linux-specific flags
allowed in sys_wait4().

In particular this change can help if we reconsider the previous change
which adds the "automagical" __WALL for debugger.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 kernel/exit.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index c112abb..9db1f4a 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1533,7 +1533,8 @@ SYSCALL_DEFINE5(waitid, int, which, pid_t, upid, struct siginfo __user *,
 	enum pid_type type;
 	long ret;
 
-	if (options & ~(WNOHANG|WNOWAIT|WEXITED|WSTOPPED|WCONTINUED))
+	if (options & ~(WNOHANG|WNOWAIT|WEXITED|WSTOPPED|WCONTINUED|
+			__WNOTHREAD|__WCLONE|__WALL))
 		return -EINVAL;
 	if (!(options & (WEXITED|WSTOPPED|WCONTINUED)))
 		return -EINVAL;
-- 
2.5.0

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[PATCH 0/2] wait/ptrace: assume __WALL if the child is traced Oleg Nesterov <oleg@redhat.com> - 2016-03-16 00:40 +0100
  [PATCH 1/2] wait/ptrace: assume __WALL if the child is traced Oleg Nesterov <oleg@redhat.com> - 2016-03-16 00:40 +0100
  [PATCH 2/2] wait: allow sys_waitid() to accept  __WNOTHREAD/__WCLONE/__WALL Oleg Nesterov <oleg@redhat.com> - 2016-03-16 00:40 +0100

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