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mm: remove page_file_index

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After using the offset of the swap entry as the key of the swap cache,
the page_index() becomes exactly same as page_file_index().  So the
page_file_index() is removed and the callers are changed to use
page_index() instead.

Link: http://lkml.kernel.org/r/1473270649-27229-2-git-send-email-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Huang Ying 2016-10-07 17:00:24 -07:00 committed by Linus Torvalds
parent f6ab1f7f6b
commit 8cd797887a
6 changed files with 8 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
fs/nfs/internal.h
View file

@ -681,11 +681,11 @@ unsigned int nfs_page_length(struct page *page)
loff_t i_size = i_size_read(page_file_mapping(page)->host);
if (i_size > 0) {
pgoff_t page_index = page_file_index(page);
pgoff_t index = page_index(page);
pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
if (page_index < end_index)
if (index < end_index)
return PAGE_SIZE;
if (page_index == end_index)
if (index == end_index)
return ((i_size - 1) & ~PAGE_MASK) + 1;
}
return 0;

2
fs/nfs/pagelist.c
View file

@ -342,7 +342,7 @@ nfs_create_request(struct nfs_open_context *ctx, struct page *page,
* update_nfs_request below if the region is not locked. */
req->wb_page = page;
if (page) {
req->wb_index = page_file_index(page);
req->wb_index = page_index(page);
get_page(page);
}
req->wb_offset = offset;

2
fs/nfs/read.c
View file

@ -295,7 +295,7 @@ int nfs_readpage(struct file *file, struct page *page)
int error;
dprintk("NFS: nfs_readpage (%p %ld@%lu)\n",
page, PAGE_SIZE, page_file_index(page));
page, PAGE_SIZE, page_index(page));
nfs_inc_stats(inode, NFSIOS_VFSREADPAGE);
nfs_add_stats(inode, NFSIOS_READPAGES, 1);

4
fs/nfs/write.c
View file

@ -151,7 +151,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c
spin_lock(&inode->i_lock);
i_size = i_size_read(inode);
end_index = (i_size - 1) >> PAGE_SHIFT;
if (i_size > 0 && page_file_index(page) < end_index)
if (i_size > 0 && page_index(page) < end_index)
goto out;
end = page_file_offset(page) + ((loff_t)offset+count);
if (i_size >= end)
@ -603,7 +603,7 @@ static int nfs_do_writepage(struct page *page, struct writeback_control *wbc,
{
int ret;
nfs_pageio_cond_complete(pgio, page_file_index(page));
nfs_pageio_cond_complete(pgio, page_index(page));
ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE,
launder);
if (ret == -EAGAIN) {

12
include/linux/mm.h
View file

@ -1061,18 +1061,6 @@ static inline pgoff_t page_index(struct page *page)
return page->index;
}
/*
* Return the file index of the page. Regular pagecache pages use ->index
* whereas swapcache pages use swp_offset(->private)
*/
static inline pgoff_t page_file_index(struct page *page)
{
if (unlikely(PageSwapCache(page)))
return __page_file_index(page);
return page->index;
}
bool page_mapped(struct page *page);
struct address_space *page_mapping(struct page *page);

2
include/linux/pagemap.h
View file

@ -408,7 +408,7 @@ static inline loff_t page_offset(struct page *page)
static inline loff_t page_file_offset(struct page *page)
{
return ((loff_t)page_file_index(page)) << PAGE_SHIFT;
return ((loff_t)page_index(page)) << PAGE_SHIFT;
}
extern pgoff_t linear_hugepage_index(struct vm_area_struct *vma,