tree a70151c57f184bccd24175fa19a585021e297973
parent e53252d97e670a38b1d2e9723b48077bba11ddda
author David Brownell <david-b@pacbell.net> 1184834872 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184864683 -0700

gpio calls don't need i/o barriers

Clarify that drivers using the GPIO operations don't need to issue io
barrier instructions themselves.  Previously this wasn't clear, and at
least one platform assumed otherwise (and would thus break various
otherwise-portable drivers which don't issue barriers).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>