It was used to compensate because MAX_NR_ZONES was not available to the #ifdefs. Export MAX_NR_ZONES via the new mechanism and get rid of __ZONE_COUNT. Signed-off-by: Christoph Lameter --- include/linux/bounds.h | 1 + include/linux/mmzone.h | 22 +++++----------------- kernel/bounds.c | 1 + 3 files changed, 7 insertions(+), 17 deletions(-) Index: linux-2.6/include/linux/mmzone.h =================================================================== --- linux-2.6.orig/include/linux/mmzone.h 2008-03-03 15:53:28.329306618 -0800 +++ linux-2.6/include/linux/mmzone.h 2008-03-03 15:54:59.166310018 -0800 @@ -17,6 +17,7 @@ #include #include #include +#include /* Free memory management - zoned buddy allocator. */ #ifndef CONFIG_FORCE_MAX_ZONEORDER @@ -177,7 +178,7 @@ enum zone_type { ZONE_HIGHMEM, #endif ZONE_MOVABLE, - MAX_NR_ZONES + __MAX_NR_ZONES }; /* @@ -188,28 +189,15 @@ enum zone_type { * match the requested limits. See gfp_zone() in include/linux/gfp.h */ -/* - * Count the active zones. Note that the use of defined(X) outside - * #if and family is not necessarily defined so ensure we cannot use - * it later. Use __ZONE_COUNT to work out how many shift bits we need. - */ -#define __ZONE_COUNT ( \ - defined(CONFIG_ZONE_DMA) \ - + defined(CONFIG_ZONE_DMA32) \ - + 1 \ - + defined(CONFIG_HIGHMEM) \ - + 1 \ -) -#if __ZONE_COUNT < 2 +#if MAX_NR_ZONES < 2 #define ZONES_SHIFT 0 -#elif __ZONE_COUNT <= 2 +#elif MAX_NR_ZONES <= 2 #define ZONES_SHIFT 1 -#elif __ZONE_COUNT <= 4 +#elif MAX_NR_ZONES <= 4 #define ZONES_SHIFT 2 #else #error ZONES_SHIFT -- too many zones configured adjust calculation #endif -#undef __ZONE_COUNT struct zone { /* Fields commonly accessed by the page allocator */ Index: linux-2.6/kernel/bounds.c =================================================================== --- linux-2.6.orig/kernel/bounds.c 2008-03-03 15:53:28.329306618 -0800 +++ linux-2.6/kernel/bounds.c 2008-03-03 15:54:34.278034457 -0800 @@ -14,4 +14,5 @@ void foo(void) { DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS); + DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES); } Index: linux-2.6/include/linux/bounds.h =================================================================== --- linux-2.6.orig/include/linux/bounds.h 2008-03-03 15:53:28.329306618 -0800 +++ linux-2.6/include/linux/bounds.h 2008-03-03 15:54:34.278034457 -0800 @@ -8,5 +8,6 @@ */ #define NR_PAGEFLAGS 32 /* __NR_PAGEFLAGS # */ +#define MAX_NR_ZONES 4 /* __MAX_NR_ZONES # */ #endif -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/