1 files changed, 131 insertions, 0 deletions
diff --git a/i386/i386at/gpl/linux/include/linux/pagemap.h b/i386/i386at/gpl/linux/include/linux/pagemap.h
new file mode 100644
index 00000000..6de993b3
--- /dev/null
+++ b/i386/i386at/gpl/linux/include/linux/pagemap.h
@@ -0,0 +1,131 @@
+#ifndef _LINUX_PAGEMAP_H
+#define _LINUX_PAGEMAP_H
+
+#include <asm/system.h>
+
+/*
+ * Page-mapping primitive inline functions
+ *
+ * Copyright 1995 Linus Torvalds
+ */
+
+#ifndef MACH
+static inline unsigned long page_address(struct page * page)
+{
+	return PAGE_OFFSET + PAGE_SIZE*(page - mem_map);
+}
+
+#define PAGE_HASH_BITS 10
+#define PAGE_HASH_SIZE (1 << PAGE_HASH_BITS)
+
+#define PAGE_AGE_VALUE 16
+
+extern unsigned long page_cache_size;
+extern struct page * page_hash_table[PAGE_HASH_SIZE];
+
+/*
+ * We use a power-of-two hash table to avoid a modulus,
+ * and get a reasonable hash by knowing roughly how the
+ * inode pointer and offsets are distributed (ie, we
+ * roughly know which bits are "significant")
+ */
+static inline unsigned long _page_hashfn(struct inode * inode, unsigned long offset)
+{
+#define i (((unsigned long) inode)/sizeof(unsigned long))
+#define o (offset >> PAGE_SHIFT)
+#define s(x) ((x)+((x)>>PAGE_HASH_BITS))
+	return s(i+o) & (PAGE_HASH_SIZE-1);
+#undef i
+#undef o
+#undef s
+}
+
+#define page_hash(inode,offset) page_hash_table[_page_hashfn(inode,offset)]
+
+static inline struct page * find_page(struct inode * inode, unsigned long offset)
+{
+	struct page *page;
+	unsigned long flags;
+	
+	for (page = page_hash(inode, offset); page ; page = page->next_hash) {
+		if (page->inode != inode)
+			continue;
+		if (page->offset != offset)
+			continue;
+		save_flags(flags);
+		cli();
+		page->referenced = 1;
+		page->count++;
+		restore_flags(flags);
+		break;
+	}
+	return page;
+}
+
+static inline void remove_page_from_hash_queue(struct page * page)
+{
+	struct page **p = &page_hash(page->inode,page->offset);
+
+	page_cache_size--;
+	if (page->next_hash)
+		page->next_hash->prev_hash = page->prev_hash;
+	if (page->prev_hash)
+		page->prev_hash->next_hash = page->next_hash;
+	if (*p == page)
+		*p = page->next_hash;
+	page->next_hash = page->prev_hash = NULL;
+}
+
+static inline void add_page_to_hash_queue(struct inode * inode, struct page * page)
+{
+	struct page **p = &page_hash(inode,page->offset);
+
+	page_cache_size++;
+	page->referenced = 1;
+	page->age = PAGE_AGE_VALUE;
+	page->prev_hash = NULL;
+	if ((page->next_hash = *p) != NULL)
+		page->next_hash->prev_hash = page;
+	*p = page;
+}
+
+static inline void remove_page_from_inode_queue(struct page * page)
+{
+	struct inode * inode = page->inode;
+
+	page->inode = NULL;
+	inode->i_nrpages--;
+	if (inode->i_pages == page)
+		inode->i_pages = page->next;
+	if (page->next)
+		page->next->prev = page->prev;
+	if (page->prev)
+		page->prev->next = page->next;
+	page->next = NULL;
+	page->prev = NULL;
+}
+
+static inline void add_page_to_inode_queue(struct inode * inode, struct page * page)
+{
+	struct page **p = &inode->i_pages;
+
+	inode->i_nrpages++;
+	page->inode = inode;
+	page->prev = NULL;
+	if ((page->next = *p) != NULL)
+		page->next->prev = page;
+	*p = page;
+}
+
+extern void __wait_on_page(struct page *);
+static inline void wait_on_page(struct page * page)
+{
+	if (page->locked)
+		__wait_on_page(page);
+}
+
+extern void update_vm_cache(struct inode *, unsigned long, const char *, int);
+
+#endif /* ! MACH */
+
+#endif