tree 0217dde7d28427e9b6ac587fd4edb9fb1f8f11b4
parent 5feb8f5f8403d8874a04aac443692dfe83bd63d2
author Eric W. Biederman <ebiederm@xmission.com> 1159780633 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1159801033 -0700

[PATCH] vt: rework the console spawning variables

This is such a rare path it took me a while to figure out how to test
this after soring out the locking.

This patch does several things.
- The variables used are moved into a structure and declared in vt_kern.h
- A spinlock is added so we don't have SMP races updating the values.
- Instead of raw pid_t value a struct_pid is used to guard against
  pid wrap around issues, if the daemon to spawn a new console dies.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>