*/
#include <linux/kernel.h>
+#include <linux/backing-dev.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/module.h>
/**
- * do_invalidatepage - invalidate part of all of a page
+ * do_invalidatepage - invalidate part or all of a page
* @page: the page which is affected
* @offset: the index of the truncation point
*
static inline void truncate_partial_page(struct page *page, unsigned partial)
{
- zero_user_page(page, partial, PAGE_CACHE_SIZE - partial, KM_USER0);
+ zero_user_segment(page, partial, PAGE_CACHE_SIZE);
if (PagePrivate(page))
do_invalidatepage(page, partial);
}
struct address_space *mapping = page->mapping;
if (mapping && mapping_cap_account_dirty(mapping)) {
dec_zone_page_state(page, NR_FILE_DIRTY);
+ dec_bdi_stat(mapping->backing_dev_info,
+ BDI_RECLAIMABLE);
if (account_size)
task_io_account_cancelled_write(account_size);
}
/*
* If truncate cannot remove the fs-private metadata from the page, the page
- * becomes anonymous. It will be left on the LRU and may even be mapped into
+ * becomes orphaned. It will be left on the LRU and may even be mapped into
* user pagetables if we're racing with filemap_fault().
*
* We need to bale out if page->mapping is no longer equal to the original
if (page->mapping != mapping)
return;
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
-
if (PagePrivate(page))
do_invalidatepage(page, 0);
+ cancel_dirty_page(page, PAGE_CACHE_SIZE);
+
remove_from_page_cache(page);
ClearPageUptodate(page);
ClearPageMappedToDisk(page);
}
/**
- * truncate_inode_pages - truncate range of pages specified by start and
- * end byte offsets
+ * truncate_inode_pages - truncate range of pages specified by start & end byte offsets
* @mapping: mapping to truncate
* @lstart: offset from which to truncate
* @lend: offset to which to truncate