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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/exit.c
parentsyscalls: define and explain goal to not call syscalls in the kernel (diff)
downloadlinux-dev-d300b610812f3c10d146db4c18f98eba38834c70.tar.xz
linux-dev-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/exit.c')
-rw-r--r--kernel/exit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 995453d9fb55..c3c7ac560114 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1691,7 +1691,7 @@ SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr,
*/
SYSCALL_DEFINE3(waitpid, pid_t, pid, int __user *, stat_addr, int, options)
{
- return sys_wait4(pid, stat_addr, options, NULL);
+ return kernel_wait4(pid, stat_addr, options, NULL);
}
#endif