tree 8a980747ab9eeaa3407e2aa2366a4c6e95dee9d0
parent 42c722d4cb4022e56ff200f3f5a58c0dfd7edac6
author Andy Whitcroft <apw@shadowen.org> 1138791926 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1138812794 -0800

[PATCH] GFP_ZONETYPES: add commentry on how to calculate

GFP_ZONETYPES define using GFP_ZONEMASK and add commentry

Add commentry explaining the optimisation that we can apply to GFP_ZONETYPES
when the leftmost bit is a 'loaner', it can only be set in isolation.

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