diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 2c8edad5dccf..9f22090df7dd 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -91,21 +91,11 @@ struct per_cpu_pageset { * will be a maximum of 4 (2 ** 2) zonelists, for 3 modifiers there will * be 8 (2 ** 3) zonelists. GFP_ZONETYPES defines the number of possible * combinations of zone modifiers in "zone modifier space". + * + * NOTE! Make sure this matches the zones in <linux/gfp.h> */ -#define GFP_ZONEMASK 0x03 -/* - * As an optimisation any zone modifier bits which are only valid when - * no other zone modifier bits are set (loners) should be placed in - * the highest order bits of this field. This allows us to reduce the - * extent of the zonelists thus saving space. For example in the case - * of three zone modifier bits, we could require up to eight zonelists. - * If the left most zone modifier is a "loner" then the highest valid - * zonelist would be four allowing us to allocate only five zonelists. - * Use the first form when the left most bit is not a "loner", otherwise - * use the second. - */ -/* #define GFP_ZONETYPES (GFP_ZONEMASK + 1) */ /* Non-loner */ -#define GFP_ZONETYPES ((GFP_ZONEMASK + 1) / 2 + 1) /* Loner */ +#define GFP_ZONEMASK 0x07 +#define GFP_ZONETYPES 5 /* * On machines where it is needed (eg PCs) we divide physical memory |