From: Oleg Nesterov <oleg@redhat.com>
Date: Wed, 27 Apr 2011 17:54:20 +0000 (+0200)
Subject: signal: sigprocmask: narrow the scope of ->siglock
X-Git-Tag: v3.0-rc1~382^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73ef4aeb61b53fce464a7e24ef03a26f98b2f617;p=pandora-kernel.git

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>
---

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