diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 22 | ||||
| -rw-r--r-- | kernel/umh.c | 6 |
2 files changed, 23 insertions, 5 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 9796897560ab..27c5203750b4 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2157,7 +2157,7 @@ static __latent_entropy struct task_struct *copy_process( p->io_context = NULL; audit_set_context(p, NULL); cgroup_fork(p); - if (p->flags & PF_KTHREAD) { + if (args->kthread) { if (!set_kthread_struct(p)) goto bad_fork_cleanup_delayacct; } @@ -2548,7 +2548,8 @@ struct task_struct * __init fork_idle(int cpu) { struct task_struct *task; struct kernel_clone_args args = { - .flags = CLONE_VM, + .flags = CLONE_VM, + .kthread = 1, }; task = copy_process(&init_struct_pid, 0, cpu_to_node(cpu), &args); @@ -2686,6 +2687,23 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) .exit_signal = (lower_32_bits(flags) & CSIGNAL), .stack = (unsigned long)fn, .stack_size = (unsigned long)arg, + .kthread = 1, + }; + + return kernel_clone(&args); +} + +/* + * Create a user mode thread. + */ +pid_t user_mode_thread(int (*fn)(void *), void *arg, unsigned long flags) +{ + struct kernel_clone_args args = { + .flags = ((lower_32_bits(flags) | CLONE_VM | + CLONE_UNTRACED) & ~CSIGNAL), + .exit_signal = (lower_32_bits(flags) & CSIGNAL), + .stack = (unsigned long)fn, + .stack_size = (unsigned long)arg, }; return kernel_clone(&args); diff --git a/kernel/umh.c b/kernel/umh.c index 36c123360ab8..b989736e8707 100644 --- a/kernel/umh.c +++ b/kernel/umh.c @@ -132,7 +132,7 @@ static void call_usermodehelper_exec_sync(struct subprocess_info *sub_info) /* If SIGCLD is ignored do_wait won't populate the status. */ kernel_sigaction(SIGCHLD, SIG_DFL); - pid = kernel_thread(call_usermodehelper_exec_async, sub_info, SIGCHLD); + pid = user_mode_thread(call_usermodehelper_exec_async, sub_info, SIGCHLD); if (pid < 0) sub_info->retval = pid; else @@ -171,8 +171,8 @@ static void call_usermodehelper_exec_work(struct work_struct *work) * want to pollute current->children, and we need a parent * that always ignores SIGCHLD to ensure auto-reaping. */ - pid = kernel_thread(call_usermodehelper_exec_async, sub_info, - CLONE_PARENT | SIGCHLD); + pid = user_mode_thread(call_usermodehelper_exec_async, sub_info, + CLONE_PARENT | SIGCHLD); if (pid < 0) { sub_info->retval = pid; umh_complete(sub_info); |