diff -Nrup linux-2.6.0-test6-uc0-develer/drivers/Makefile linux-2.6.x/drivers/Makefile --- linux-2.6.0-test6-uc0-develer/drivers/Makefile 2003-09-28 02:50:41.000000000 +0200 +++ linux-2.6.x/drivers/Makefile 2003-09-29 01:05:48.000000000 +0200 @@ -17,7 +17,8 @@ obj-$(CONFIG_PNP) += pnp/ obj-y += char/ obj-y += serial/ obj-$(CONFIG_PARPORT) += parport/ -obj-y += base/ block/ misc/ net/ media/ +obj-y += base/ misc/ net/ media/ +obj-$(CONFIG_BIO) += block/ obj-$(CONFIG_NUBUS) += nubus/ obj-$(CONFIG_ATM) += atm/ obj-$(CONFIG_PPC_PMAC) += macintosh/ diff -Nrup linux-2.6.0-test6-uc0-develer/drivers/block/Makefile linux-2.6.x/drivers/block/Makefile --- linux-2.6.0-test6-uc0-develer/drivers/block/Makefile 2003-09-28 02:50:48.000000000 +0200 +++ linux-2.6.x/drivers/block/Makefile 2003-09-29 01:05:07.000000000 +0200 @@ -13,7 +13,7 @@ # kblockd threads # -obj-y := elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o +obj-$(CONFIG_BIO) += elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o obj-$(CONFIG_IOSCHED_AS) += as-iosched.o diff -Nrup linux-2.6.0-test6-uc0-develer/fs/Makefile linux-2.6.x/fs/Makefile --- linux-2.6.0-test6-uc0-develer/fs/Makefile 2003-09-28 02:50:29.000000000 +0200 +++ linux-2.6.x/fs/Makefile 2003-09-29 01:09:34.000000000 +0200 @@ -5,12 +5,14 @@ # Rewritten to use lists instead of if-statements. # -obj-y := open.o read_write.o file_table.o buffer.o \ - bio.o super.o block_dev.o char_dev.o stat.o exec.o pipe.o \ +obj-y := open.o read_write.o buffer.o file_table.o \ + super.o char_dev.o stat.o exec.o pipe.o \ namei.o fcntl.o ioctl.o readdir.o select.o fifo.o locks.o \ dcache.o inode.o attr.o bad_inode.o file.o dnotify.o \ filesystems.o namespace.o seq_file.o xattr.o libfs.o \ - fs-writeback.o mpage.o direct-io.o aio.o + fs-writeback.o aio.o + +obj-$(CONFIG_BIO) += bio.o block_dev.o mpage.o direct-io.o obj-$(CONFIG_EPOLL) += eventpoll.o obj-$(CONFIG_COMPAT) += compat.o diff -Nrup linux-2.6.0-test6-uc0-develer/fs/buffer.c linux-2.6.x/fs/buffer.c --- linux-2.6.0-test6-uc0-develer/fs/buffer.c 2003-09-28 02:50:29.000000000 +0200 +++ linux-2.6.x/fs/buffer.c 2003-09-29 03:01:25.000000000 +0200 @@ -35,6 +35,8 @@ #include #include #include +#include +#include #include #include #include @@ -1072,6 +1074,8 @@ no_grow: goto try_again; } +#ifdef CONFIG_BIO + static inline void link_dev_buffers(struct page *page, struct buffer_head *head) { @@ -1220,6 +1224,8 @@ __getblk_slow(struct block_device *bdev, } } +#endif /* CONFIG_BIO */ + /* * The relationship between dirty buffers and dirty pages: * @@ -1395,6 +1401,8 @@ static void bh_lru_install(struct buffer __brelse(evictee); } +#ifdef CONFIG_BIO + /* * Look up the bh in this cpu's LRU. If it's there, move it to the head. */ @@ -1503,6 +1511,8 @@ __bread(struct block_device *bdev, secto } EXPORT_SYMBOL(__bread); +#endif /* CONFIG_BIO */ + /* * invalidate_bh_lrus() is called rarely - at unmount. Because it is only for * unmount it only needs to ensure that all buffers from the target device are @@ -1557,6 +1567,8 @@ static inline void discard_buffer(struct unlock_buffer(bh); } +#ifdef CONFIG_BIO + /** * try_to_release_page() - release old fs-specific metadata on a page * @@ -1638,6 +1650,8 @@ out: } EXPORT_SYMBOL(block_invalidatepage); +#endif /* CONFIG_BIO */ + /* * We attach and possibly dirty the buffers atomically wrt * __set_page_dirty_buffers() via private_lock. try_to_free_buffers @@ -1707,6 +1721,8 @@ void unmap_underlying_metadata(struct bl } EXPORT_SYMBOL(unmap_underlying_metadata); +#ifdef CONFIG_BIO + /* * NOTE! All mapped/uptodate combinations are valid: * @@ -1902,6 +1918,8 @@ recover: goto done; } +#endif /* CONFIG_BIO */ + static int __block_prepare_write(struct inode *inode, struct page *page, unsigned from, unsigned to, get_block_t *get_block) { @@ -2507,6 +2525,8 @@ out: } EXPORT_SYMBOL(nobh_truncate_page); +#ifdef CONFIG_BIO + int block_truncate_page(struct address_space *mapping, loff_t from, get_block_t *get_block) { @@ -2889,6 +2909,8 @@ int block_sync_page(struct page *page) return 0; } +#endif /* CONFIG_BIO */ + /* * There are no bdflush tunables left. But distributions are * still running obsolete flush daemons, so we terminate them here. diff -Nrup linux-2.6.0-test6-uc0-develer/fs/dcache.c linux-2.6.x/fs/dcache.c --- linux-2.6.0-test6-uc0-develer/fs/dcache.c 2003-09-28 02:50:09.000000000 +0200 +++ linux-2.6.x/fs/dcache.c 2003-09-29 03:40:43.000000000 +0200 @@ -1636,6 +1636,8 @@ void __init vfs_caches_init(unsigned lon inode_init(mempages); files_init(mempages); mnt_init(mempages); +#ifdef CONFIG_BIO bdev_cache_init(); +#endif chrdev_init(); } diff -Nrup linux-2.6.0-test6-uc0-develer/fs/fs-writeback.c linux-2.6.x/fs/fs-writeback.c --- linux-2.6.0-test6-uc0-develer/fs/fs-writeback.c 2003-09-28 02:51:21.000000000 +0200 +++ linux-2.6.x/fs/fs-writeback.c 2003-09-29 03:46:24.000000000 +0200 @@ -216,6 +216,7 @@ __writeback_single_inode(struct inode *i __sync_single_inode(inode, wbc); } +#ifdef CONFIG_BIO /* * Write out a superblock's list of dirty inodes. A wait will be performed * upon no inodes, all inodes or the final one, depending upon sync_mode. @@ -321,6 +322,7 @@ sync_sb_inodes(struct super_block *sb, s } return; /* Leave any unwritten inodes on s_io */ } +#endif /* CONFIG_BIO */ /* * Start writeback of dirty pagecache data against all unlocked inodes. diff -Nrup linux-2.6.0-test6-uc0-develer/fs/partitions/Makefile linux-2.6.x/fs/partitions/Makefile --- linux-2.6.0-test6-uc0-develer/fs/partitions/Makefile 2003-09-28 02:50:17.000000000 +0200 +++ linux-2.6.x/fs/partitions/Makefile 2003-09-29 03:43:16.000000000 +0200 @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -obj-y := check.o +obj-$(CONFIG_BIO) += check.o obj-$(CONFIG_DEVFS_FS) += devfs.o obj-$(CONFIG_ACORN_PARTITION) += acorn.o diff -Nrup linux-2.6.0-test6-uc0-develer/fs/partitions/check.c linux-2.6.x/fs/partitions/check.c --- linux-2.6.0-test6-uc0-develer/fs/partitions/check.c 2003-09-28 02:51:00.000000000 +0200 +++ linux-2.6.x/fs/partitions/check.c 2003-09-29 03:41:58.000000000 +0200 @@ -129,6 +129,7 @@ char *disk_name(struct gendisk *hd, int return buf; } +#ifdef CONFIG_BIO const char *bdevname(struct block_device *bdev, char *buf) { int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; @@ -157,6 +158,7 @@ const char *__bdevname(dev_t dev, char * return buffer; } +#endif /* CONFIG_BIO */ static struct parsed_partitions * check_partition(struct gendisk *hd, struct block_device *bdev) @@ -413,6 +415,8 @@ int rescan_partitions(struct gendisk *di return res; } +#ifdef CONFIG_BIO + unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) { struct address_space *mapping = bdev->bd_inode->i_mapping; @@ -435,6 +439,8 @@ fail: return NULL; } +#endif /* CONFIG_BIO */ + void del_gendisk(struct gendisk *disk) { int p; diff -Nrup linux-2.6.0-test6-uc0-develer/fs/proc/proc_misc.c linux-2.6.x/fs/proc/proc_misc.c --- linux-2.6.0-test6-uc0-develer/fs/proc/proc_misc.c 2003-09-28 02:50:09.000000000 +0200 +++ linux-2.6.x/fs/proc/proc_misc.c 2003-09-29 03:48:59.000000000 +0200 @@ -316,6 +316,7 @@ static struct file_operations proc_parti .release = seq_release, }; +#ifdef CONFIG_BIO extern struct seq_operations diskstats_op; static int diskstats_open(struct inode *inode, struct file *file) { @@ -327,6 +328,7 @@ static struct file_operations proc_disks .llseek = seq_lseek, .release = seq_release, }; +#endif /* CONFIG_BIO */ #ifdef CONFIG_MODULES extern struct seq_operations modules_op; @@ -469,7 +471,9 @@ static int devices_read_proc(char *page, int count, int *eof, void *data) { int len = get_chrdev_list(page); +#ifdef CONFIG_BIO len += get_blkdev_list(page+len); +#endif return proc_calc_metrics(page, start, off, count, eof, len); } @@ -675,13 +679,17 @@ void __init proc_misc_init(void) if (entry) entry->proc_fops = &proc_kmsg_operations; create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations); +#ifdef CONFIG_BIO create_seq_entry("partitions", 0, &proc_partitions_operations); +#endif create_seq_entry("stat", 0, &proc_stat_operations); create_seq_entry("interrupts", 0, &proc_interrupts_operations); create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations); create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations); create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations); +#ifdef CONFIG_BIO create_seq_entry("diskstats", 0, &proc_diskstats_operations); +#endif #ifdef CONFIG_MODULES create_seq_entry("modules", 0, &proc_modules_operations); #endif diff -Nrup linux-2.6.0-test6-uc0-develer/fs/super.c linux-2.6.x/fs/super.c --- linux-2.6.0-test6-uc0-develer/fs/super.c 2003-09-28 02:50:18.000000000 +0200 +++ linux-2.6.x/fs/super.c 2003-09-29 01:51:14.000000000 +0200 @@ -452,9 +452,12 @@ static void mark_files_ro(struct super_b int do_remount_sb(struct super_block *sb, int flags, void *data, int force) { int retval; - + +#ifdef CONFIG_BIO if (!(flags & MS_RDONLY) && bdev_read_only(sb->s_bdev)) return -EACCES; +#endif /* CONFIG_BIO */ + if (flags & MS_RDONLY) acct_auto_close(sb); shrink_dcache_sb(sb); @@ -550,6 +553,8 @@ void kill_litter_super(struct super_bloc kill_anon_super(sb); } +#ifdef CONFIG_BIO + static int set_bdev_super(struct super_block *s, void *data) { s->s_bdev = data; @@ -616,6 +621,8 @@ void kill_block_super(struct super_block close_bdev_excl(bdev, BDEV_FS); } +#endif /* CONFIG_BIO */ + struct super_block *get_sb_nodev(struct file_system_type *fs_type, int flags, void *data, int (*fill_super)(struct super_block *, void *, int)) diff -Nrup linux-2.6.0-test6-uc0-develer/include/linux/bio.h linux-2.6.x/include/linux/bio.h --- linux-2.6.0-test6-uc0-develer/include/linux/bio.h 2003-09-28 02:50:39.000000000 +0200 +++ linux-2.6.x/include/linux/bio.h 2003-09-29 00:43:22.000000000 +0200 @@ -20,6 +20,8 @@ #ifndef __LINUX_BIO_H #define __LINUX_BIO_H +#ifdef CONFIG_BIO + #include #include @@ -296,4 +298,6 @@ extern inline char *__bio_kmap_irq(struc __bio_kmap_irq((bio), (bio)->bi_idx, (flags)) #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags) +#endif /* CONFIG_BIO */ + #endif /* __LINUX_BIO_H */ diff -Nrup linux-2.6.0-test6-uc0-develer/include/linux/blkdev.h linux-2.6.x/include/linux/blkdev.h --- linux-2.6.0-test6-uc0-develer/include/linux/blkdev.h 2003-09-28 02:50:11.000000000 +0200 +++ linux-2.6.x/include/linux/blkdev.h 2003-09-29 00:44:06.000000000 +0200 @@ -1,6 +1,8 @@ #ifndef _LINUX_BLKDEV_H #define _LINUX_BLKDEV_H +#ifdef CONFIG_BIO + #include #include #include @@ -680,5 +682,6 @@ void kblockd_flush(void); #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \ MODULE_ALIAS("block-major-" __stringify(major) "-*") +#endif /* CONFIG_BIO */ #endif diff -Nrup linux-2.6.0-test6-uc0-develer/include/linux/mpage.h linux-2.6.x/include/linux/mpage.h --- linux-2.6.0-test6-uc0-develer/include/linux/mpage.h 2003-09-28 02:50:17.000000000 +0200 +++ linux-2.6.x/include/linux/mpage.h 2003-09-29 02:01:24.000000000 +0200 @@ -10,6 +10,8 @@ * nested includes. Get it right in the .c file). */ +#ifdef CONFIG_BIO + struct writeback_control; int mpage_readpages(struct address_space *mapping, struct list_head *pages, @@ -23,3 +25,5 @@ generic_writepages(struct address_space { return mpage_writepages(mapping, wbc, NULL); } + +#endif /* CONFIG_BIO */ diff -Nrup linux-2.6.0-test6-uc0-develer/kernel/exit.c linux-2.6.x/kernel/exit.c --- linux-2.6.0-test6-uc0-develer/kernel/exit.c 2003-09-28 02:50:54.000000000 +0200 +++ linux-2.6.x/kernel/exit.c 2003-09-29 01:45:34.000000000 +0200 @@ -687,8 +687,10 @@ NORET_TYPE void do_exit(long code) panic("Attempted to kill the idle task!"); if (unlikely(tsk->pid == 1)) panic("Attempted to kill init!"); +#ifdef CONFIG_BIO if (tsk->io_context) exit_io_context(); +#endif /* CONFIG_BIO */ tsk->flags |= PF_EXITING; del_timer_sync(&tsk->real_timer); diff -Nrup linux-2.6.0-test6-uc0-develer/mm/filemap.c linux-2.6.x/mm/filemap.c --- linux-2.6.0-test6-uc0-develer/mm/filemap.c 2003-09-28 02:50:15.000000000 +0200 +++ linux-2.6.x/mm/filemap.c 2003-09-29 01:52:55.000000000 +0200 @@ -25,7 +25,7 @@ #include #include #include -#include +#include #include /* * This is needed for the following functions: @@ -1625,8 +1625,10 @@ inline int generic_write_checks(struct i *count = inode->i_sb->s_maxbytes - *pos; } else { loff_t isize; +#ifdef CONFIG_BIO if (bdev_read_only(inode->i_bdev)) return -EPERM; +#endif /* CONFIG_BIO */ isize = i_size_read(inode); if (*pos >= isize) { if (*count || *pos > isize) diff -Nrup linux-2.6.0-test6-uc0-develer/mm/mempool.c linux-2.6.x/mm/mempool.c --- linux-2.6.0-test6-uc0-develer/mm/mempool.c 2003-09-28 02:50:30.000000000 +0200 +++ linux-2.6.x/mm/mempool.c 2003-09-29 01:55:38.000000000 +0200 @@ -216,6 +216,7 @@ repeat_alloc: return element; } +#ifdef CONFIG_BIO /* * Kick the VM at this point. */ @@ -241,6 +242,7 @@ repeat_alloc: finish_wait(&pool->wait, &wait); goto repeat_alloc; +#endif CONFIG_BIO } EXPORT_SYMBOL(mempool_alloc); diff -Nrup linux-2.6.0-test6-uc0-develer/mm/page-writeback.c linux-2.6.x/mm/page-writeback.c --- linux-2.6.0-test6-uc0-develer/mm/page-writeback.c 2003-09-28 02:50:36.000000000 +0200 +++ linux-2.6.x/mm/page-writeback.c 2003-09-29 02:24:06.000000000 +0200 @@ -189,7 +189,9 @@ static void balance_dirty_pages(struct a if (pages_written >= write_chunk) break; /* We've done our duty */ } +#ifdef CONFIG_BIO blk_congestion_wait(WRITE, HZ/10); +#endif /* CONFIG_BIO */ } if (nr_reclaimable + ps.nr_writeback <= dirty_thresh) @@ -265,7 +267,11 @@ static void background_writeout(unsigned if (wbc.nr_to_write > 0) { /* Wrote less than expected */ if (wbc.encountered_congestion) +#ifdef CONFIG_BIO blk_congestion_wait(WRITE, HZ/10); +#else + ; +#endif else break; } @@ -335,7 +341,11 @@ static void wb_kupdate(unsigned long arg writeback_inodes(&wbc); if (wbc.nr_to_write > 0) { if (wbc.encountered_congestion) +#ifdef CONFIG_BIO blk_congestion_wait(WRITE, HZ/10); +#else + ; +#endif else break; /* All the old data is written */ } @@ -442,7 +452,12 @@ int do_writepages(struct address_space * { if (mapping->a_ops->writepages) return mapping->a_ops->writepages(mapping, wbc); +#ifdef CONFIG_BIO return generic_writepages(mapping, wbc); +#else + BUG(); + return NULL; +#endif } /** diff -Nrup linux-2.6.0-test6-uc0-develer/mm/page_alloc.c linux-2.6.x/mm/page_alloc.c --- linux-2.6.0-test6-uc0-develer/mm/page_alloc.c 2003-09-28 02:50:08.000000000 +0200 +++ linux-2.6.x/mm/page_alloc.c 2003-09-29 00:53:14.000000000 +0200 @@ -543,7 +543,6 @@ __alloc_pages(unsigned int gfp_mask, uns struct task_struct *p = current; int i; int cold; - int do_retry; might_sleep_if(wait); @@ -607,7 +606,9 @@ __alloc_pages(unsigned int gfp_mask, uns /* here we're in the low on memory slow path */ +#ifdef CONFIG_BIO rebalance: +#endif if ((p->flags & (PF_MEMALLOC | PF_MEMDIE)) && !in_interrupt()) { /* go through the zonelist yet again, ignoring mins */ for (i = 0; zones[i] != NULL; i++) { @@ -648,24 +649,28 @@ rebalance: min += z->pages_low * sysctl_lower_zone_protection; } - /* - * Don't let big-order allocations loop unless the caller explicitly - * requests that. Wait for some write requests to complete then retry. - * - * In this implementation, __GFP_REPEAT means __GFP_NOFAIL, but that - * may not be true in other implementations. - */ - do_retry = 0; - if (!(gfp_mask & __GFP_NORETRY)) { - if ((order <= 3) || (gfp_mask & __GFP_REPEAT)) - do_retry = 1; - if (gfp_mask & __GFP_NOFAIL) - do_retry = 1; - } - if (do_retry) { - blk_congestion_wait(WRITE, HZ/50); - goto rebalance; +#ifdef CONFIG_BIO + { + /* + * Don't let big-order allocations loop unless the caller explicitly + * requests that. Wait for some write requests to complete then retry. + * + * In this implementation, __GFP_REPEAT means __GFP_NOFAIL, but that + * may not be true in other implementations. + */ + bool do_retry = false; + if (!(gfp_mask & __GFP_NORETRY)) { + if ((order <= 3) || (gfp_mask & __GFP_REPEAT)) + do_retry = true; + if (gfp_mask & __GFP_NOFAIL) + do_retry = true; + } + if (do_retry) { + blk_congestion_wait(WRITE, HZ/50); + goto rebalance; + } } +#endif /* CONFIG_BIO */ nopage: if (!(gfp_mask & __GFP_NOWARN)) { @@ -906,7 +911,11 @@ void si_meminfo(struct sysinfo *val) val->totalram = totalram_pages; val->sharedram = 0; val->freeram = nr_free_pages(); +#ifdef CONFIG_BIO val->bufferram = nr_blockdev_pages(); +#else + val->bufferram = 0; +#endif #ifdef CONFIG_HIGHMEM val->totalhigh = totalhigh_pages; val->freehigh = nr_free_highpages(); diff -Nrup linux-2.6.0-test6-uc0-develer/mm/readahead.c linux-2.6.x/mm/readahead.c --- linux-2.6.0-test6-uc0-develer/mm/readahead.c 2003-09-28 02:50:08.000000000 +0200 +++ linux-2.6.x/mm/readahead.c 2003-09-29 00:54:21.000000000 +0200 @@ -11,6 +11,7 @@ #include #include #include +#include #include #include diff -Nrup linux-2.6.0-test6-uc0-develer/mm/swap.c linux-2.6.x/mm/swap.c --- linux-2.6.0-test6-uc0-develer/mm/swap.c 2003-09-28 02:50:16.000000000 +0200 +++ linux-2.6.x/mm/swap.c 2003-09-29 03:02:30.000000000 +0200 @@ -308,6 +308,8 @@ void __pagevec_lru_add_active(struct pag pagevec_reinit(pvec); } +#ifdef CONFIG_BIO + /* * Try to drop buffers from the pages in a pagevec */ @@ -325,6 +327,8 @@ void pagevec_strip(struct pagevec *pvec) } } +#endif /* CONFIG_BIO */ + /** * pagevec_lookup - gang pagecache lookup * @pvec: Where the resulting pages are placed diff -Nrup linux-2.6.0-test6-uc0-develer/mm/truncate.c linux-2.6.x/mm/truncate.c --- linux-2.6.0-test6-uc0-develer/mm/truncate.c 2003-09-28 02:51:05.000000000 +0200 +++ linux-2.6.x/mm/truncate.c 2003-09-29 03:04:58.000000000 +0200 @@ -20,7 +20,11 @@ static int do_invalidatepage(struct page int (*invalidatepage)(struct page *, unsigned long); invalidatepage = page->mapping->a_ops->invalidatepage; if (invalidatepage == NULL) +#ifdef CONFIG_BIO invalidatepage = block_invalidatepage; +#else + BUG(); +#endif return (*invalidatepage)(page, offset); } diff -Nrup linux-2.6.0-test6-uc0-develer/mm/vmscan.c linux-2.6.x/mm/vmscan.c --- linux-2.6.0-test6-uc0-develer/mm/vmscan.c 2003-09-28 02:50:09.000000000 +0200 +++ linux-2.6.x/mm/vmscan.c 2003-09-29 02:45:41.000000000 +0200 @@ -878,6 +878,8 @@ int try_to_free_pages(struct zone *cz, } if (!(gfp_mask & __GFP_FS)) break; /* Let the caller handle it */ + +#ifdef CONFIG_BIO /* * Try to write back as many pages as we just scanned. Not * sure if that makes sense, but it's an attempt to avoid @@ -887,6 +889,8 @@ int try_to_free_pages(struct zone *cz, /* Take a nap, wait for some writeback to complete */ blk_congestion_wait(WRITE, HZ/10); +#endif /* CONFIG_BIO */ + if (cz - cz->zone_pgdat->node_zones < ZONE_HIGHMEM) { shrink_slab(total_scanned, gfp_mask); if (reclaim_state) { @@ -976,8 +980,10 @@ static int balance_pgdat(pg_data_t *pgda } if (all_zones_ok) break; +#ifdef CONFIG_BIO if (to_free > 0) blk_congestion_wait(WRITE, HZ/10); +#endif /* CONFIG_BIO */ } for (i = 0; i < pgdat->nr_zones; i++) {