tree 70e8b7fd41d6503e105cdd0b5b9ed3e6f7c464ee
parent 579035dc5ddd6d48fd8529e7358b03d911ab9d8a
author Andi Kleen <ak@linux.intel.com> 1347916155 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1347919238 -0700

compiler.h: add __visible

gcc 4.6+ has support for a externally_visible attribute that prevents the
optimizer from optimizing unused symbols away.  Add a __visible macro to
use it with that compiler version or later.

This is used (at least) by the "Link Time Optimization" patchset.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>