patch-2.3.16 linux/include/linux/mm.h

• Lines: 93
• Date: Tue Aug 31 16:12:06 1999
• Orig file: v2.3.15/linux/include/linux/mm.h
• Orig date: Wed Aug 18 16:43:40 1999

diff -u --recursive --new-file v2.3.15/linux/include/linux/mm.h linux/include/linux/mm.h
@@ -6,6 +6,7 @@
 
 #ifdef __KERNEL__
 
+#include <linux/config.h>
 #include <linux/string.h>
 
 extern unsigned long max_mapnr;
@@ -125,6 +126,7 @@
 	struct page *next_hash;
 	atomic_t count;
 	unsigned long flags;	/* atomic flags, some possibly updated asynchronously */
+	struct list_head lru;
 	wait_queue_head_t wait;
 	struct page **pprev_hash;
 	struct buffer_head * buffers;
@@ -145,14 +147,13 @@
 #define PG_error		 1
 #define PG_referenced		 2
 #define PG_uptodate		 3
-#define PG_free_after		 4
 #define PG_decr_after		 5
-#define PG_free_swap_after	 6
 #define PG_DMA			 7
 #define PG_Slab			 8
 #define PG_swap_cache		 9
 #define PG_skip			10
 #define PG_swap_entry		11
+#define PG_BIGMEM		12
 				/* bits 21-30 unused */
 #define PG_reserved		31
 
@@ -180,9 +181,7 @@
 #define SetPageError(page)	({ int _ret = test_and_set_bit(PG_error, &(page)->flags); _ret; })
 #define ClearPageError(page)	do { if (!test_and_clear_bit(PG_error, &(page)->flags)) BUG(); } while (0)
 #define PageReferenced(page)	(test_bit(PG_referenced, &(page)->flags))
-#define PageFreeAfter(page)	(test_bit(PG_free_after, &(page)->flags))
 #define PageDecrAfter(page)	(test_bit(PG_decr_after, &(page)->flags))
-#define PageSwapUnlockAfter(page) (test_bit(PG_free_swap_after, &(page)->flags))
 #define PageDMA(page)		(test_bit(PG_DMA, &(page)->flags))
 #define PageSlab(page)		(test_bit(PG_Slab, &(page)->flags))
 #define PageSwapCache(page)	(test_bit(PG_swap_cache, &(page)->flags))
@@ -199,6 +198,11 @@
 
 #define PageTestandClearSwapCache(page)	\
 			(test_and_clear_bit(PG_swap_cache, &(page)->flags))
+#ifdef CONFIG_BIGMEM
+#define PageBIGMEM(page)	(test_bit(PG_BIGMEM, &(page)->flags))
+#else
+#define PageBIGMEM(page) 0 /* needed to optimize away at compile time */
+#endif
 
 /*
  * Various page->flags bits:
@@ -259,8 +263,6 @@
  * PG_uptodate tells whether the page's contents is valid.
  * When a read completes, the page becomes uptodate, unless a disk I/O
  * error happened.
- * When a write completes, and PG_free_after is set, the page is
- * freed without any further delay.
  *
  * For choosing which pages to swap out, inode pages carry a
  * PG_referenced bit, which is set any time the system accesses
@@ -357,11 +359,17 @@
 #define __GFP_HIGH	0x08
 #define __GFP_IO	0x10
 #define __GFP_SWAP	0x20
+#ifdef CONFIG_BIGMEM
+#define __GFP_BIGMEM	0x40
+#else
+#define __GFP_BIGMEM	0x0 /* noop */
+#endif
 
 #define __GFP_DMA	0x80
 
 #define GFP_BUFFER	(__GFP_LOW | __GFP_WAIT)
 #define GFP_ATOMIC	(__GFP_HIGH)
+#define GFP_BIGUSER	(__GFP_LOW | __GFP_WAIT | __GFP_IO | __GFP_BIGMEM)
 #define GFP_USER	(__GFP_LOW | __GFP_WAIT | __GFP_IO)
 #define GFP_KERNEL	(__GFP_MED | __GFP_WAIT | __GFP_IO)
 #define GFP_NFS		(__GFP_HIGH | __GFP_WAIT | __GFP_IO)
@@ -371,6 +379,11 @@
    platforms, used as appropriate on others */
 
 #define GFP_DMA		__GFP_DMA
+
+/* Flag - indicates that the buffer can be taken from big memory which is not
+   directly addressable by the kernel */
+
+#define GFP_BIGMEM	__GFP_BIGMEM
 
 /* vma is the first one with  address < vma->vm_end,
  * and even  address < vma->vm_start. Have to extend vma. */