tree b90eac24ff367bc628c44eaa51a9f0ea1b69d1a4
parent 3c517a6132098ca37e122a2980fc64a9e798b0d7
author Andy Whitcroft <apw@shadowen.org> 1165466012 -0800
committer Linus Torvalds <torvalds@woody.osdl.org> 1165509565 -0800

[PATCH] mm: make compound page destructor handling explicit

Currently we we use the lru head link of the second page of a compound page
to hold its destructor.  This was ok when it was purely an internal
implmentation detail.  However, hugetlbfs overrides this destructor
violating the layering.  Abstract this out as explicit calls, also
introduce a type for the callback function allowing them to be type
checked.  For each callback we pre-declare the function, causing a type
error on definition rather than on use elsewhere.

[akpm@osdl.org: cleanups]
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>