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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-16 12:36:06 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:16:06 +0200
commite2aaa9f423367ee03755d632555c242629a08d00 (patch)
treec1a4039cf313ab25dcee01b8c90e0fffdd7ff32a /kernel/sys.c
parent9b32105ec6b13d32d5db6a6e7992c97ce54b5ea7 (diff)
downloadlinux-e2aaa9f423367ee03755d632555c242629a08d00.tar.bz2
kernel: add ksys_setsid() helper; remove in-kernel call to sys_setsid()
Using this helper allows us to avoid the in-kernel call to the sys_setsid() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_setsid(). 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 Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'kernel/sys.c')
-rw-r--r--kernel/sys.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 550f47788ae4..ad692183dfe9 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1150,7 +1150,7 @@ static void set_special_pids(struct pid *pid)
change_pid(curr, PIDTYPE_PGID, pid);
}
-SYSCALL_DEFINE0(setsid)
+int ksys_setsid(void)
{
struct task_struct *group_leader = current->group_leader;
struct pid *sid = task_pid(group_leader);
@@ -1183,6 +1183,11 @@ out:
return err;
}
+SYSCALL_DEFINE0(setsid)
+{
+ return ksys_setsid();
+}
+
DECLARE_RWSEM(uts_sem);
#ifdef COMPAT_UTS_MACHINE