v2.4.9.14 -> v2.4.9.15

  - Jan Harkes: make Coda work with arbitrary host filesystems, not
  just filesystems that use generic_file_read/write
  - Al Viro: block device cleanups
  - Hugh Dickins: swap device lock fixes - fix swap readahead race
  - me, Andrea: more reference bit cleanups

3 files changed, 20 insertions, 35 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 31a2167afac8..9eca17f8ee1b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -415,6 +415,7 @@ struct block_device {
 	int			bd_cache_openers;
 	const struct block_device_operations *bd_op;
 	struct semaphore	bd_sem;	/* open/close mutex */
+	struct list_head	bd_inodes;
 };
 
 struct inode {
@@ -452,6 +453,7 @@ struct inode {
 	int			i_mapping_overload;
 	struct dquot		*i_dquot[MAXQUOTAS];
 	/* These three should probably be a union */
+	struct list_head	i_devices;
 	struct pipe_inode_info	*i_pipe;
 	struct block_device	*i_bdev;
 	struct char_device	*i_cdev;
@@ -1046,6 +1048,8 @@ enum {BDEV_FILE, BDEV_SWAP, BDEV_FS, BDEV_RAW};
 extern int register_blkdev(unsigned int, const char *, struct block_device_operations *);
 extern int unregister_blkdev(unsigned int, const char *);
 extern struct block_device *bdget(dev_t);
+extern int bd_acquire(struct inode *inode);
+extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern struct char_device *cdget(dev_t);
 extern void cdput(struct char_device *);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8f9e8bfbce88..494d025d143d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -274,7 +274,6 @@ typedef struct page {
 #define PG_active		 6
 #define PG_inactive		 7
 #define PG_slab			 8
-#define PG_swap_cache		 9
 #define PG_skip			10
 #define PG_highmem		11
 #define PG_checked		12	/* kill me in 2.5.<early>. */
@@ -326,18 +325,9 @@ static inline void set_page_dirty(struct page * page)
 #define SetPageDecrAfter(page)	set_bit(PG_decr_after, &(page)->flags)
 #define PageTestandClearDecrAfter(page)	test_and_clear_bit(PG_decr_after, &(page)->flags)
 #define PageSlab(page)		test_bit(PG_slab, &(page)->flags)
-#define PageSwapCache(page)	test_bit(PG_swap_cache, &(page)->flags)
-#define PageReserved(page)	test_bit(PG_reserved, &(page)->flags)
-
 #define PageSetSlab(page)	set_bit(PG_slab, &(page)->flags)
-#define PageSetSwapCache(page)	set_bit(PG_swap_cache, &(page)->flags)
-
-#define PageTestandSetSwapCache(page)	test_and_set_bit(PG_swap_cache, &(page)->flags)
-
-#define PageClearSlab(page)		clear_bit(PG_slab, &(page)->flags)
-#define PageClearSwapCache(page)	clear_bit(PG_swap_cache, &(page)->flags)
-
-#define PageTestandClearSwapCache(page)	test_and_clear_bit(PG_swap_cache, &(page)->flags)
+#define PageClearSlab(page)	clear_bit(PG_slab, &(page)->flags)
+#define PageReserved(page)	test_bit(PG_reserved, &(page)->flags)
 
 #define PageActive(page)	test_bit(PG_active, &(page)->flags)
 #define SetPageActive(page)	set_bit(PG_active, &(page)->flags)
@@ -465,6 +455,9 @@ extern void show_mem(void);
 extern void si_meminfo(struct sysinfo * val);
 extern void swapin_readahead(swp_entry_t);
 
+extern struct address_space swapper_space;
+#define PageSwapCache(page) ((page)->mapping == &swapper_space)
+
 static inline int is_page_cache_freeable(struct page * page)
 {
 	return page_count(page) - !!page->buffers == 1;
@@ -476,15 +469,13 @@ static inline int is_page_cache_freeable(struct page * page)
  */
 static inline int exclusive_swap_page(struct page *page)
 {
-	unsigned int count;
-
 	if (!PageLocked(page))
 		BUG();
 	if (!PageSwapCache(page))
 		return 0;
-	count = page_count(page) - !!page->buffers;	/*  2: us + swap cache */
-	count += swap_count(page);			/* +1: just swap cache */
-	return count == 3;				/* =3: total */
+	if (page_count(page) - !!page->buffers != 2)	/* 2: us + cache */
+		return 0;
+	return swap_count(page) == 1;			/* 1: just cache */
 }
 
 extern void __free_pte(pte_t);
@@ -565,11 +556,10 @@ extern struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int);
 #define GFP_NOFS	(__GFP_HIGH | __GFP_WAIT | __GFP_IO | __GFP_HIGHIO)
 #define GFP_ATOMIC	(__GFP_HIGH)
 #define GFP_USER	(             __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS)
-#define GFP_HIGHUSER	(             __GFP_WAIT | __GFP_IO | __GFP_HIGHIO \
-	       	| __GFP_FS | __GFP_HIGHMEM)
+#define GFP_HIGHUSER	(             __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS | __GFP_HIGHMEM)
 #define GFP_KERNEL	(__GFP_HIGH | __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS)
-#define GFP_NFS	(__GFP_HIGH | __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS)
-#define GFP_KSWAPD	(                          __GFP_IO | __GFP_HIGHIO | __GFP_FS)
+#define GFP_NFS		(__GFP_HIGH | __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS)
+#define GFP_KSWAPD	(             __GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_FS)
 
 /* Flag - indicates that the buffer will be suitable for DMA.  Ignored on some
    platforms, used as appropriate on others */
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 0ce8a374a11d..0282b6bac60c 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -84,7 +84,6 @@ extern unsigned int nr_free_buffer_pages(void);
 extern int nr_active_pages;
 extern int nr_inactive_pages;
 extern atomic_t nr_async_pages;
-extern struct address_space swapper_space;
 extern atomic_t page_cache_size;
 extern atomic_t buffermem_pages;
 extern spinlock_t pagecache_lock;
@@ -122,35 +121,27 @@ extern void rw_swap_page_nolock(int, swp_entry_t, char *);
 /* linux/mm/swap_state.c */
 extern void show_swap_cache_info(void);
 extern void add_to_swap_cache(struct page *, swp_entry_t);
-extern int swap_check_entry(unsigned long);
+extern void __delete_from_swap_cache(struct page *page);
+extern void delete_from_swap_cache(struct page *page);
+extern void free_page_and_swap_cache(struct page *page);
 extern struct page * lookup_swap_cache(swp_entry_t);
 extern struct page * read_swap_cache_async(swp_entry_t);
 
 /* linux/mm/oom_kill.c */
 extern void oom_kill(void);
 
-/*
- * Make these inline later once they are working properly.
- */
-extern void __delete_from_swap_cache(struct page *page);
-extern void delete_from_swap_cache(struct page *page);
-extern void delete_from_swap_cache_nolock(struct page *page);
-extern void free_page_and_swap_cache(struct page *page);
-
 /* linux/mm/swapfile.c */
 extern unsigned int nr_swapfiles;
 extern struct swap_info_struct swap_info[];
 extern int is_swap_partition(kdev_t);
 extern void si_swapinfo(struct sysinfo *);
-extern swp_entry_t __get_swap_page(unsigned short);
+extern swp_entry_t get_swap_page(void);
 extern void get_swaphandle_info(swp_entry_t, unsigned long *, kdev_t *, 
 					struct inode **);
 extern int swap_duplicate(swp_entry_t);
 extern int swap_count(struct page *);
 extern int valid_swaphandles(swp_entry_t, unsigned long *);
-#define get_swap_page() __get_swap_page(1)
-extern void __swap_free(swp_entry_t, unsigned short);
-#define swap_free(entry) __swap_free((entry), 1)
+extern void swap_free(swp_entry_t);
 struct swap_list_t {
 	int head;	/* head of priority-ordered swapfile list */
 	int next;	/* swapfile to be used next */