#include <linux/fs.h>
#include <linux/list.h>
#include <linux/highmem.h>
+#include <linux/compiler.h>
#include <asm/uaccess.h>
#include <linux/gfp.h>
#define AS_EIO (__GFP_BITS_SHIFT + 0) /* IO error on async write */
#define AS_ENOSPC (__GFP_BITS_SHIFT + 1) /* ENOSPC on async write */
-static inline int mapping_gfp_mask(struct address_space * mapping)
+static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
{
- return mapping->flags & __GFP_BITS_MASK;
+ return (__force gfp_t)mapping->flags & __GFP_BITS_MASK;
}
/*
* This is non-atomic. Only to be used before the mapping is activated.
* Probably needs a barrier...
*/
-static inline void mapping_set_gfp_mask(struct address_space *m, int mask)
+static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
{
- m->flags = (m->flags & ~__GFP_BITS_MASK) | mask;
+ m->flags = (m->flags & ~(__force unsigned long)__GFP_BITS_MASK) |
+ (__force unsigned long)mask;
}
/*
#define page_cache_release(page) put_page(page)
void release_pages(struct page **pages, int nr, int cold);
+#ifdef CONFIG_NUMA
+extern struct page *page_cache_alloc(struct address_space *x);
+extern struct page *page_cache_alloc_cold(struct address_space *x);
+#else
static inline struct page *page_cache_alloc(struct address_space *x)
{
return alloc_pages(mapping_gfp_mask(x), 0);
{
return alloc_pages(mapping_gfp_mask(x)|__GFP_COLD, 0);
}
+#endif
typedef int filler_t(void *, struct page *);
unsigned long index);
extern struct page * find_lock_page(struct address_space *mapping,
unsigned long index);
-extern struct page * find_trylock_page(struct address_space *mapping,
- unsigned long index);
+extern __deprecated_for_modules struct page * find_trylock_page(
+ struct address_space *mapping, unsigned long index);
extern struct page * find_or_create_page(struct address_space *mapping,
- unsigned long index, unsigned int gfp_mask);
+ unsigned long index, gfp_t gfp_mask);
unsigned find_get_pages(struct address_space *mapping, pgoff_t start,
unsigned int nr_pages, struct page **pages);
+unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start,
+ unsigned int nr_pages, struct page **pages);
unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index,
int tag, unsigned int nr_pages, struct page **pages);
struct list_head *pages, filler_t *filler, void *data);
int add_to_page_cache(struct page *page, struct address_space *mapping,
- unsigned long index, int gfp_mask);
+ unsigned long index, gfp_t gfp_mask);
int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
- unsigned long index, int gfp_mask);
+ unsigned long index, gfp_t gfp_mask);
extern void remove_from_page_cache(struct page *page);
extern void __remove_from_page_cache(struct page *page);
static inline unsigned long get_page_cache_size(void)
{
- return atomic_read(&nr_pagecache);
+ int ret = atomic_read(&nr_pagecache);
+ if (unlikely(ret < 0))
+ ret = 0;
+ return ret;
+}
+
+/*
+ * Return byte-offset into filesystem object for page.
+ */
+static inline loff_t page_offset(struct page *page)
+{
+ return ((loff_t)page->index) << PAGE_CACHE_SHIFT;
}
static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
static inline void lock_page(struct page *page)
{
+ might_sleep();
if (TestSetPageLocked(page))
__lock_page(page);
}