Import 2.3.99pre7-4

arch/i386/kernel/acpi.c

@@ -700,11 +700,7 @@ static int __init acpi_init_piix4(struct pci_dev *dev)
 	if (!(pmregmisc & ACPI_PIIX4_PMIOSE))
 		return -ENODEV;
 	
-	pci_read_config_dword(dev, 0x40, &base);
-	if (!(base & PCI_BASE_ADDRESS_SPACE_IO))
-		return -ENODEV;
-	
-	base &= PCI_BASE_ADDRESS_IO_MASK;
+	base = dev->resource[PCI_BRIDGE_RESOURCES].start & PCI_BASE_ADDRESS_IO_MASK;
 	if (!base)
 		return -ENODEV;
 
@@ -757,16 +753,13 @@ static int __init acpi_init_via(struct pci_dev *dev)
 	if (!(tmp & 0x80))
 		return -ENODEV;
 
-	pci_read_config_byte(dev, PCI_CLASS_REVISION, &tmp);
-	tmp = (tmp & 0x10 ? 0x48 : 0x20);
-
-	pci_read_config_dword(dev, tmp, &base);
-	if (!(base & PCI_BASE_ADDRESS_SPACE_IO))
-		return -ENODEV;
-
-	base &= PCI_BASE_ADDRESS_IO_MASK;
+	base = pci_resource_start(dev, PCI_BRIDGE_RESOURCES);
+	if (!base) {
+		base = pci_resource_start(dev, PCI_BASE_ADDRESS_4);
 		if (!base)
 			return -ENODEV;
+	}
+	base &= PCI_BASE_ADDRESS_IO_MASK;
 
 	pci_read_config_byte(dev, 0x42, &irq);
 

arch/i386/kernel/pci-irq.c

@@ -433,7 +433,6 @@ void __init pcibios_fixup_irqs(void)
 					dev->irq = irq;
 				}
 			}
-			pirq_table = NULL;	/* Avoid automatic IRQ assignment */
 		}
 #endif
 		/*

drivers/net/pcnet32.c

@@ -15,7 +15,6 @@
 
 static const char *version = "pcnet32.c:v1.25kf 26.9.1999 tsbogend@alpha.franken.de\n";
 
-#include <linux/config.h>
 #include <linux/module.h>
 
 #include <linux/kernel.h>

drivers/pci/quirks.c

@@ -163,6 +163,23 @@ static void __init quirk_piix4acpi(struct pci_dev *dev)
 	quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
 }
 
+/*
+ * VIA ACPI: One IO region pointed to by longword at
+ *	0x48 or 0x20 (256 bytes of ACPI registers)
+ */
+static void __init quirk_via_acpi(struct pci_dev *dev)
+{
+	u8 rev;
+	u32 region;
+
+	pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
+	if (rev & 0x10) {
+		pci_read_config_dword(dev, 0x48, &region);
+		region &= PCI_BASE_ADDRESS_IO_MASK;
+		quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES);
+	}
+}
+
 /*
  *  The main table of quirks.
  */
@@ -192,6 +209,8 @@ static struct pci_fixup pci_fixups[] __initdata = {
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_INTEL, 	PCI_DEVICE_ID_INTEL_82443BX_2, 	quirk_natoma },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_5597,		quirk_nopcipci },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_496,		quirk_nopcipci },
+	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C586_3,	quirk_via_acpi },
+	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686_4,	quirk_via_acpi },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82371AB_3,	quirk_piix4acpi },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M7101,		quirk_ali7101 },
 	{ 0 }

fs/super.c

@@ -4,9 +4,11 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
  *  super.c contains code to handle: - mount structures
- *                                   - super-block tables.
+ *                                   - super-block tables
+ *                                   - filesystem drivers list
  *                                   - mount system call
  *                                   - umount system call
+ *                                   - ustat system call
  *
  *  Added options to /proc/mounts
  *  Torbjrn Lindh (torbjorn.lindh@gopta.se), April 14, 1996.
@@ -288,7 +290,7 @@ static struct vfsmount *add_vfsmnt(struct super_block *sb,
 	struct vfsmount *mnt;
 	char *name;
 
-	mnt = (struct vfsmount *)kmalloc(sizeof(struct vfsmount), GFP_KERNEL);
+	mnt = kmalloc(sizeof(struct vfsmount), GFP_KERNEL);
 	if (!mnt)
 		goto out;
 	memset(mnt, 0, sizeof(struct vfsmount));
@@ -302,19 +304,17 @@ static struct vfsmount *add_vfsmnt(struct super_block *sb,
 
 	/* N.B. Is it really OK to have a vfsmount without names? */
 	if (dev_name) {
-		name = (char *) kmalloc(strlen(dev_name)+1, GFP_KERNEL);
+		name = kmalloc(strlen(dev_name)+1, GFP_KERNEL);
 		if (name) {
 			strcpy(name, dev_name);
 			mnt->mnt_devname = name;
 		}
 	}
-	if (dir_name) {
-		name = (char *) kmalloc(strlen(dir_name)+1, GFP_KERNEL);
+	name = kmalloc(strlen(dir_name)+1, GFP_KERNEL);
 	if (name) {
 		strcpy(name, dir_name);
 		mnt->mnt_dirname = name;
 	}
-	}
 
 	list_add(&mnt->mnt_instances, &sb->s_mounts);
 	list_add(&mnt->mnt_clash, &mountpoint->d_vfsmnt);
@@ -336,12 +336,12 @@ static void move_vfsmnt(struct vfsmount *mnt,
 	char *new_devname = NULL, *new_dirname = NULL;
 
 	if (dev_name) {
-		new_devname = (char *) kmalloc(strlen(dev_name)+1, GFP_KERNEL);
+		new_devname = kmalloc(strlen(dev_name)+1, GFP_KERNEL);
 		if (new_devname)
 			strcpy(new_devname, dev_name);
 	}
 	if (dir_name) {
-		new_dirname = (char *) kmalloc(strlen(dir_name)+1, GFP_KERNEL);
+		new_dirname = kmalloc(strlen(dir_name)+1, GFP_KERNEL);
 		if (new_dirname)
 			strcpy(new_dirname, dir_name);
 	}

include/asm-i386/spinlock.h

@@ -12,7 +12,7 @@ extern int printk(const char * fmt, ...)
  * initialize their spinlocks properly, tsk tsk.
  * Remember to turn this off in 2.4. -ben
  */
-#define SPINLOCK_DEBUG	1
+#define SPINLOCK_DEBUG	0
 
 /*
  * Your basic SMP spinlocks, allowing only a single CPU anywhere

include/linux/pagemap.h

@@ -80,6 +80,7 @@ extern void lock_page(struct page *page);
 extern void __add_page_to_hash_queue(struct page * page, struct page **p);
 
 extern void add_to_page_cache(struct page * page, struct address_space *mapping, unsigned long index);
+extern void add_to_page_cache_locked(struct page * page, struct address_space *mapping, unsigned long index);
 
 extern inline void add_page_to_hash_queue(struct page * page, struct inode * inode, unsigned long index)
 {

ipc/shm.c

@@ -1455,6 +1455,7 @@ static int shm_swap_core(struct shmid_kernel *shp, unsigned long idx, swp_entry_
 	   reading a not yet uptodate block from disk.
 	   NOTE: we just accounted the swap space reference for this
 	   swap cache page at __get_swap_page() time. */
+	lock_page(page_map);
 	add_to_swap_cache(*outpage = page_map, swap_entry);
 	return OKAY;
 }

kernel/exit.c

@@ -429,12 +429,12 @@ NORET_TYPE void do_exit(long code)
 #ifdef CONFIG_BSD_PROCESS_ACCT
 	acct_process(code);
 #endif
+	task_lock(tsk);
 	sem_exit();
 	__exit_mm(tsk);
 	__exit_files(tsk);
 	__exit_fs(tsk);
 	__exit_sighand(tsk);
-	task_lock(tsk);
 	exit_thread();
 	tsk->state = TASK_ZOMBIE;
 	tsk->exit_code = code;

mm/filemap.c

@@ -46,7 +46,7 @@ unsigned int page_hash_bits;
 struct page **page_hash_table;
 struct list_head lru_cache;
 
-spinlock_t pagecache_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t pagecache_lock = SPIN_LOCK_UNLOCKED;
 /*
  * NOTE: to avoid deadlocking you must never acquire the pagecache_lock with
  *       the pagemap_lru_lock held.
@@ -485,6 +485,26 @@ int generic_buffer_fdatasync(struct inode *inode, unsigned long start_idx, unsig
 	return retval;
 }
 
+/*
+ * Add a page to the inode page cache.
+ *
+ * The caller must have locked the page and 
+ * set all the page flags correctly..
+ */
+void add_to_page_cache_locked(struct page * page, struct address_space *mapping, unsigned long index)
+{
+	if (!PageLocked(page))
+		BUG();
+
+	get_page(page);
+	spin_lock(&pagecache_lock);
+	page->index = index;
+	add_page_to_inode_queue(mapping, page);
+	__add_page_to_hash_queue(page, page_hash(mapping, index));
+	lru_cache_add(page);
+	spin_unlock(&pagecache_lock);
+}
+
 /*
  * This adds a page to the page cache, starting out as locked,
  * owned by us, referenced, but not uptodate and with no errors.
@@ -1514,12 +1534,8 @@ static int filemap_write_page(struct file *file,
 			      struct page * page,
 			      int wait)
 {
-	int result;
-	struct dentry * dentry;
-	struct inode * inode;
-
-	dentry = file->f_dentry;
-	inode = dentry->d_inode;
+	struct dentry * dentry = file->f_dentry;
+	struct inode * inode = dentry->d_inode;
 
 	/*
 	 * If a task terminates while we're swapping the page, the vma and
@@ -1527,10 +1543,7 @@ static int filemap_write_page(struct file *file,
 	 * vma/file is guaranteed to exist in the unmap/sync cases because
 	 * mmap_sem is held.
 	 */
-	lock_page(page);
-	result = inode->i_mapping->a_ops->writepage(file, dentry, page);
-	UnlockPage(page);
-	return result;
+	return inode->i_mapping->a_ops->writepage(file, dentry, page);
 }
 
 
@@ -1588,7 +1601,9 @@ static inline int filemap_sync_pte(pte_t * ptep, struct vm_area_struct *vma,
 		printk("weirdness: pgoff=%lu index=%lu address=%lu vm_start=%lu vm_pgoff=%lu\n",
 			pgoff, page->index, address, vma->vm_start, vma->vm_pgoff);
 	}
+	lock_page(page);
 	error = filemap_write_page(vma->vm_file, pgoff, page, 1);
+	UnlockPage(page);
 	page_cache_free(page);
 	return error;
 }

mm/highmem.c

@@ -24,8 +24,12 @@
 
 unsigned long highmem_mapnr;
 
+/*
+ * Take one locked page, return another low-memory locked page.
+ */
 struct page * prepare_highmem_swapout(struct page * page)
 {
+	struct page *new_page;
 	unsigned long regular_page;
 	unsigned long vaddr;
 	/*
@@ -36,6 +40,14 @@ struct page * prepare_highmem_swapout(struct page * page)
 	if (!PageHighMem(page))
 		return page;
 
+	/*
+	 * Here we break the page lock, and we split the
+	 * dirty page into two. We can unlock the old page,
+	 * and we'll now have two of them. Too bad, it would
+	 * have been nice to continue to potentially share
+	 * across a fork().
+	 */
+	UnlockPage(page);
 	regular_page = __get_free_page(GFP_ATOMIC);
 	if (!regular_page)
 		return NULL;
@@ -49,8 +61,9 @@ struct page * prepare_highmem_swapout(struct page * page)
 	 * we stored its data into the new regular_page.
 	 */
 	__free_page(page);
-
-	return mem_map + MAP_NR(regular_page);
+	new_page = mem_map + MAP_NR(regular_page);
+	LockPage(new_page);
+	return new_page;
 }
 
 struct page * replace_with_highmem(struct page * page)

mm/swap_state.c

@@ -47,14 +47,20 @@ void show_swap_cache_info(void)
 
 void add_to_swap_cache(struct page *page, swp_entry_t entry)
 {
+	unsigned long flags;
+
 #ifdef SWAP_CACHE_INFO
 	swap_cache_add_total++;
 #endif
+	if (!PageLocked(page))
+		BUG();
 	if (PageTestandSetSwapCache(page))
 		BUG();
 	if (page->mapping)
 		BUG();
-	add_to_page_cache(page, &swapper_space, entry.val);
+	flags = page->flags & ~((1 << PG_error) | (1 << PG_dirty));
+	page->flags = flags | (1 << PG_referenced) | (1 << PG_uptodate);
+	add_to_page_cache_locked(page, &swapper_space, entry.val);
 }
 
 static inline void remove_from_swap_cache(struct page *page)
@@ -225,6 +231,7 @@ struct page * read_swap_cache_async(swp_entry_t entry, int wait)
 	/* 
 	 * Add it to the swap cache and read its contents.
 	 */
+	lock_page(new_page);
 	add_to_swap_cache(new_page, entry);
 	rw_swap_page(READ, new_page, wait);
 	return new_page;

mm/vmscan.c

@@ -60,8 +60,7 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 		goto out_failed;
 	}
 
-#error Do not let this one slip through..
-	if (PageLocked(page))
+	if (TryLockPage(page))
 		goto out_failed;
 
 	/*
@@ -77,6 +76,7 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 		swap_duplicate(entry);
 		set_pte(page_table, swp_entry_to_pte(entry));
 drop_pte:
+		UnlockPage(page);
 		vma->vm_mm->rss--;
 		flush_tlb_page(vma, address);
 		__free_page(page);
@@ -108,7 +108,7 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 	 * locks etc.
 	 */
 	if (!(gfp_mask & __GFP_IO))
-		goto out_failed;
+		goto out_unlock;
 
 	/*
 	 * Ok, it's really dirty. That means that
@@ -139,6 +139,7 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 		flush_tlb_page(vma, address);
 		vmlist_access_unlock(vma->vm_mm);
 		error = swapout(page, file);
+		UnlockPage(page);
 		if (file) fput(file);
 		if (!error)
 			goto out_free_success;
@@ -154,15 +155,16 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 	 */
 	entry = get_swap_page();
 	if (!entry.val)
-		goto out_failed; /* No swap space left */
+		goto out_unlock; /* No swap space left */
 
 	if (!(page = prepare_highmem_swapout(page)))
 		goto out_swap_free;
 
 	swap_duplicate(entry);	/* One for the process, one for the swap cache */
 
-	/* This will also lock the page */
+	/* Add it to the swap cache */
 	add_to_swap_cache(page, entry);
+
 	/* Put the swap entry into the pte after the page is in swapcache */
 	vma->vm_mm->rss--;
 	set_pte(page_table, swp_entry_to_pte(entry));
@@ -179,7 +181,9 @@ static int try_to_swap_out(struct mm_struct * mm, struct vm_area_struct* vma, un
 	swap_free(entry);
 out_failed:
 	return 0;
-
+out_unlock:
+	UnlockPage(page);
+	return 0;
 }
 
 /*
@@ -530,11 +534,11 @@ int kswapd(void *unused)
 			for (i = 0; i < MAX_NR_ZONES; i++) {
 				int count = SWAP_CLUSTER_MAX;
 				zone = pgdat->node_zones + i;
+				if ((!zone->size) || (!zone->zone_wake_kswapd))
+					continue;
 				do {
 					if (tsk->need_resched)
 						schedule();
-				if ((!zone->size) || (!zone->zone_wake_kswapd))
-					continue;
 					do_try_to_free_pages(GFP_KSWAPD, zone);
 		 		} while (zone->free_pages < zone->pages_low &&
 					   --count);