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uml: Don't consult current to find the proc_mnt in mconsole_proc

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Inspection of the control flow reveals that mconsole_proc is either
called from mconsole_stop called from mc_work_proc or from
mc_work_proc directly.  The function mc_work_proc is dispatched to a
kernel thread with schedule_work.

All of the threads that run dispatched by schedule_work are in the
init pid namespace.

So make the code clearer and by using init_pid_ns instead of
task_active_pid_ns(current).

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-06-27 14:39:54 -05:00
parent a13ae69715
commit af1abab986
1 changed files with 1 additions and 1 deletions
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2
arch/um/drivers/mconsole_kern.c
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@ -123,7 +123,7 @@ void mconsole_log(struct mc_request *req)
void mconsole_proc(struct mc_request *req)
{
struct vfsmount *mnt = task_active_pid_ns(current)->proc_mnt;
struct vfsmount *mnt = init_pid_ns.proc_mnt;
char *buf;
int len;
struct file *file;