new helpers: {clear,test,test_and_clear}_restore_sigmask()
authorAl Viro <viro@zeniv.linux.org.uk>
Fri, 27 Apr 2012 02:29:20 +0000 (22:29 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Fri, 1 Jun 2012 16:58:47 +0000 (12:58 -0400)
helpers parallel to set_restore_sigmask(), used in the next commits

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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