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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:26 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:14:51 +0200
commitd300b610812f3c10d146db4c18f98eba38834c70 (patch)
tree6d94625d00a319d89fc8b9b6be6fd606a2c9a1d0 /kernel/umh.c
parent819671ff849b07b9831b91de879ddc5da4b333d4 (diff)
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/umh.c')
-rw-r--r--kernel/umh.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/umh.c b/kernel/umh.c
index 18e5fa4b0e71..f76b3ff876cf 100644
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -118,7 +118,7 @@ static void call_usermodehelper_exec_sync(struct subprocess_info *sub_info)
{
pid_t pid;
- /* If SIGCLD is ignored sys_wait4 won't populate the status. */
+ /* If SIGCLD is ignored kernel_wait4 won't populate the status. */
kernel_sigaction(SIGCHLD, SIG_DFL);
pid = kernel_thread(call_usermodehelper_exec_async, sub_info, SIGCHLD);
if (pid < 0) {
@@ -135,7 +135,7 @@ static void call_usermodehelper_exec_sync(struct subprocess_info *sub_info)
*
* Thus the __user pointer cast is valid here.
*/
- sys_wait4(pid, (int __user *)&ret, 0, NULL);
+ kernel_wait4(pid, (int __user *)&ret, 0, NULL);
/*
* If ret is 0, either call_usermodehelper_exec_async failed and

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