Hi Andrew, After merging the akpm-current tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: arch/powerpc/mm/hash_utils_64.c: In function 'htab_bolt_mapping': arch/powerpc/mm/hash_utils_64.c:260:28: error: 'linear_map_hash_count' undeclared (first use in this function) (paddr >> PAGE_SHIFT) < linear_map_hash_count) ^ arch/powerpc/mm/hash_utils_64.c:260:28: note: each undeclared identifier is reported only once for each function it appears in arch/powerpc/mm/hash_utils_64.c:261:4: error: 'linear_map_hash_slots' undeclared (first use in this function) linear_map_hash_slots[paddr >> PAGE_SHIFT] = ret | 0x80; ^ arch/powerpc/mm/hash_utils_64.c: In function 'htab_initialize': arch/powerpc/mm/hash_utils_64.c:724:3: error: 'linear_map_hash_count' undeclared (first use in this function) linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT; ^ arch/powerpc/mm/hash_utils_64.c:725:3: error: 'linear_map_hash_slots' undeclared (first use in this function) linear_map_hash_slots = __va(memblock_alloc_base( ^ Caused by commit 79581c9f284e ("powerpc: query dynamic DEBUG_PAGEALLOC setting") The CONFIG_DEBUG_PAGEALLOC stuff in this file depends on extra data being kept which was left under CONFIG_DEBUG_PAGEALLOC protection. I just reverted this commit for today. -- Cheers, Stephen Rothwell -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html