tree 15acc5d7ded643ccd1da1d502033822a2452497c
parent fec9993db093acfc3999a364e31f8adae41fcb28
author Oleg Nesterov <oleg@redhat.com> 1303926860 +0200
committer Oleg Nesterov <oleg@redhat.com> 1303988496 +0200

signal: sigprocmask: narrow the scope of ->siglock

No functional changes, preparation to simplify the review of the next change.

1. We can read current->block lockless, nobody else can ever change this mask.

2. Calculate the resulting sigset_t outside of ->siglock into the temporary
   variable, then take ->siglock and change ->blocked.

Also, kill the stale comment about BKL.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Matt Fleming <matt.fleming@linux.intel.com>
Acked-by: Tejun Heo <tj@kernel.org>