sched: Document task_struct::personality field

Signed-off-by: Andrei Epure <epure.andrei@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1365701429-4721-1-git-send-email-epure.andrei@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9004f6e19eac..6bdaa73ede13 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1105,8 +1105,10 @@ struct task_struct {
         int exit_code, exit_signal;
         int pdeath_signal;  /*  The signal sent when the parent dies  */
         unsigned int jobctl;    /* JOBCTL_*, siglock protected */
-        /* ??? */
+
+        /* Used for emulating ABI behavior of previous Linux versions */
         unsigned int personality;
+
         unsigned did_exec:1;
         unsigned in_execve:1;   /* Tell the LSMs that the process is doing an
                                  * execve */