Commit e2aaa9f4 authored by Dominik Brodowski's avatar Dominik Brodowski

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

Cc: Al Viro <>
Signed-off-by: default avatarDominik Brodowski <>
parent 9b32105e
......@@ -962,6 +962,7 @@ off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence);
ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count);
void ksys_sync(void);
int ksys_unshare(unsigned long unshare_flags);
int ksys_setsid(void);
* The following kernel syscall equivalents are just wrappers to fs-internal
......@@ -45,7 +45,7 @@ static int init_linuxrc(struct subprocess_info *info, struct cred *new)
ksys_mount(".", "/", NULL, MS_MOVE, NULL);
return 0;
......@@ -1150,7 +1150,7 @@ static void set_special_pids(struct pid *pid)
change_pid(curr, PIDTYPE_PGID, pid);
int ksys_setsid(void)
struct task_struct *group_leader = current->group_leader;
struct pid *sid = task_pid(group_leader);
......@@ -1183,6 +1183,11 @@ SYSCALL_DEFINE0(setsid)
return err;
return ksys_setsid();
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment