diff options
Diffstat (limited to 'i386/i386at/gpl/linux/include/linux/pagemap.h')
-rw-r--r-- | i386/i386at/gpl/linux/include/linux/pagemap.h | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/i386/i386at/gpl/linux/include/linux/pagemap.h b/i386/i386at/gpl/linux/include/linux/pagemap.h deleted file mode 100644 index 6de993b3..00000000 --- a/i386/i386at/gpl/linux/include/linux/pagemap.h +++ /dev/null @@ -1,131 +0,0 @@ -#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 |