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Message-Id: <20200201151240.24082-6-willy@infradead.org>
Date: Sat, 1 Feb 2020 07:12:33 -0800
From: Matthew Wilcox <willy@...radead.org>
To: linux-fsdevel@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
cluster-devel@...hat.com, ocfs2-devel@....oracle.com
Subject: [PATCH v4 05/12] fs: Convert mpage_readpages to mpage_readahead
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
Implement the new readahead aop and convert all callers (block_dev,
exfat, ext2, fat, gfs2, hpfs, isofs, jfs, nilfs2, ocfs2, omfs, qnx6,
reiserfs & udf). The callers are all trivial except for GFS2 & OCFS2.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Cc: cluster-devel@...hat.com
Cc: ocfs2-devel@....oracle.com
---
drivers/staging/exfat/exfat_super.c | 9 ++++---
fs/block_dev.c | 9 ++++---
fs/ext2/inode.c | 12 ++++-----
fs/fat/inode.c | 8 +++---
fs/gfs2/aops.c | 20 +++++++--------
fs/hpfs/file.c | 8 +++---
fs/iomap/buffered-io.c | 2 +-
fs/isofs/inode.c | 9 ++++---
fs/jfs/inode.c | 8 +++---
fs/mpage.c | 38 ++++++++++-------------------
fs/nilfs2/inode.c | 13 +++++-----
fs/ocfs2/aops.c | 32 +++++++++++-------------
fs/omfs/file.c | 8 +++---
fs/qnx6/inode.c | 8 +++---
fs/reiserfs/inode.c | 10 ++++----
fs/udf/inode.c | 8 +++---
include/linux/mpage.h | 2 +-
mm/migrate.c | 2 +-
18 files changed, 96 insertions(+), 110 deletions(-)
diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
index b81d2a87b82e..4dbfd8c84a1b 100644
--- a/drivers/staging/exfat/exfat_super.c
+++ b/drivers/staging/exfat/exfat_super.c
@@ -3002,10 +3002,11 @@ static int exfat_readpage(struct file *file, struct page *page)
return mpage_readpage(page, exfat_get_block);
}
-static int exfat_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned int nr_pages)
+static
+unsigned exfat_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned int nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, exfat_get_block);
+ return mpage_readahead(mapping, start, nr_pages, exfat_get_block);
}
static int exfat_writepage(struct page *page, struct writeback_control *wbc)
@@ -3104,7 +3105,7 @@ static sector_t _exfat_bmap(struct address_space *mapping, sector_t block)
static const struct address_space_operations exfat_aops = {
.readpage = exfat_readpage,
- .readpages = exfat_readpages,
+ .readahead = exfat_readahead,
.writepage = exfat_writepage,
.writepages = exfat_writepages,
.write_begin = exfat_write_begin,
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 69bf2fb6f7cd..826a5104ff56 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -614,10 +614,11 @@ static int blkdev_readpage(struct file * file, struct page * page)
return block_read_full_page(page, blkdev_get_block);
}
-static int blkdev_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static
+unsigned blkdev_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, blkdev_get_block);
+ return mpage_readahead(mapping, start, nr_pages, blkdev_get_block);
}
static int blkdev_write_begin(struct file *file, struct address_space *mapping,
@@ -2062,7 +2063,7 @@ static int blkdev_writepages(struct address_space *mapping,
static const struct address_space_operations def_blk_aops = {
.readpage = blkdev_readpage,
- .readpages = blkdev_readpages,
+ .readahead = blkdev_readahead,
.writepage = blkdev_writepage,
.write_begin = blkdev_write_begin,
.write_end = blkdev_write_end,
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 119667e65890..0440eb9f24de 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -877,11 +877,11 @@ static int ext2_readpage(struct file *file, struct page *page)
return mpage_readpage(page, ext2_get_block);
}
-static int
-ext2_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned
+ext2_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, ext2_get_block);
+ return mpage_readahead(mapping, start, nr_pages, ext2_get_block);
}
static int
@@ -966,7 +966,7 @@ ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc
const struct address_space_operations ext2_aops = {
.readpage = ext2_readpage,
- .readpages = ext2_readpages,
+ .readahead = ext2_readahead,
.writepage = ext2_writepage,
.write_begin = ext2_write_begin,
.write_end = ext2_write_end,
@@ -980,7 +980,7 @@ const struct address_space_operations ext2_aops = {
const struct address_space_operations ext2_nobh_aops = {
.readpage = ext2_readpage,
- .readpages = ext2_readpages,
+ .readahead = ext2_readahead,
.writepage = ext2_nobh_writepage,
.write_begin = ext2_nobh_write_begin,
.write_end = nobh_write_end,
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 594b05ae16c9..a671dc6a122a 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -210,10 +210,10 @@ static int fat_readpage(struct file *file, struct page *page)
return mpage_readpage(page, fat_get_block);
}
-static int fat_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned fat_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
+ return mpage_readahead(mapping, start, nr_pages, fat_get_block);
}
static void fat_write_failed(struct address_space *mapping, loff_t to)
@@ -344,7 +344,7 @@ int fat_block_truncate_page(struct inode *inode, loff_t from)
static const struct address_space_operations fat_aops = {
.readpage = fat_readpage,
- .readpages = fat_readpages,
+ .readahead = fat_readahead,
.writepage = fat_writepage,
.writepages = fat_writepages,
.write_begin = fat_write_begin,
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index ba83b49ce18c..5c6d89603f91 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -577,7 +577,7 @@ int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos,
}
/**
- * gfs2_readpages - Read a bunch of pages at once
+ * gfs2_readahead - Read a bunch of pages at once
* @file: The file to read from
* @mapping: Address space info
* @pages: List of pages to read
@@ -590,16 +590,15 @@ int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos,
* obviously not something we'd want to do on too regular a basis.
* Any I/O we ignore at this time will be done via readpage later.
* 2. We don't handle stuffed files here we let readpage do the honours.
- * 3. mpage_readpages() does most of the heavy lifting in the common case.
+ * 3. mpage_readahead() does most of the heavy lifting in the common case.
* 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places.
*/
-static int gfs2_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned gfs2_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
struct inode *inode = mapping->host;
struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_sbd *sdp = GFS2_SB(inode);
struct gfs2_holder gh;
int ret;
@@ -608,13 +607,12 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping,
if (unlikely(ret))
goto out_uninit;
if (!gfs2_is_stuffed(ip))
- ret = mpage_readpages(mapping, pages, nr_pages, gfs2_block_map);
+ nr_pages = mpage_readahead(mapping, start, nr_pages,
+ gfs2_block_map);
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);
- if (unlikely(gfs2_withdrawn(sdp)))
- ret = -EIO;
- return ret;
+ return nr_pages;
}
/**
@@ -828,7 +826,7 @@ static const struct address_space_operations gfs2_aops = {
.writepage = gfs2_writepage,
.writepages = gfs2_writepages,
.readpage = gfs2_readpage,
- .readpages = gfs2_readpages,
+ .readahead = gfs2_readahead,
.bmap = gfs2_bmap,
.invalidatepage = gfs2_invalidatepage,
.releasepage = gfs2_releasepage,
@@ -842,7 +840,7 @@ static const struct address_space_operations gfs2_jdata_aops = {
.writepage = gfs2_jdata_writepage,
.writepages = gfs2_jdata_writepages,
.readpage = gfs2_readpage,
- .readpages = gfs2_readpages,
+ .readahead = gfs2_readahead,
.set_page_dirty = jdata_set_page_dirty,
.bmap = gfs2_bmap,
.invalidatepage = gfs2_invalidatepage,
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index b36abf9cb345..a0f7cc0262ae 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -125,10 +125,10 @@ static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
return block_write_full_page(page, hpfs_get_block, wbc);
}
-static int hpfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned hpfs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, hpfs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, hpfs_get_block);
}
static int hpfs_writepages(struct address_space *mapping,
@@ -198,7 +198,7 @@ static int hpfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
const struct address_space_operations hpfs_aops = {
.readpage = hpfs_readpage,
.writepage = hpfs_writepage,
- .readpages = hpfs_readpages,
+ .readahead = hpfs_readahead,
.writepages = hpfs_writepages,
.write_begin = hpfs_write_begin,
.write_end = hpfs_write_end,
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 7c84c4c027c4..cb3511eb152a 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -359,7 +359,7 @@ iomap_readpage(struct page *page, const struct iomap_ops *ops)
}
/*
- * Just like mpage_readpages and block_read_full_page we always
+ * Just like mpage_readahead and block_read_full_page we always
* return 0 and just mark the page as PageError on errors. This
* should be cleaned up all through the stack eventually.
*/
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 62c0462dc89f..11154cc35b16 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -1185,10 +1185,11 @@ static int isofs_readpage(struct file *file, struct page *page)
return mpage_readpage(page, isofs_get_block);
}
-static int isofs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static
+unsigned isofs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, isofs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, isofs_get_block);
}
static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
@@ -1198,7 +1199,7 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
static const struct address_space_operations isofs_aops = {
.readpage = isofs_readpage,
- .readpages = isofs_readpages,
+ .readahead = isofs_readahead,
.bmap = _isofs_bmap
};
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 9486afcdac76..1ed926ac2bb9 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -296,10 +296,10 @@ static int jfs_readpage(struct file *file, struct page *page)
return mpage_readpage(page, jfs_get_block);
}
-static int jfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned jfs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, jfs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, jfs_get_block);
}
static void jfs_write_failed(struct address_space *mapping, loff_t to)
@@ -358,7 +358,7 @@ static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
const struct address_space_operations jfs_aops = {
.readpage = jfs_readpage,
- .readpages = jfs_readpages,
+ .readahead = jfs_readahead,
.writepage = jfs_writepage,
.writepages = jfs_writepages,
.write_begin = jfs_write_begin,
diff --git a/fs/mpage.c b/fs/mpage.c
index ccba3c4c4479..91a148bcd582 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -91,7 +91,7 @@ mpage_alloc(struct block_device *bdev,
}
/*
- * support function for mpage_readpages. The fs supplied get_block might
+ * support function for mpage_readahead. The fs supplied get_block might
* return an up to date buffer. This is used to map that buffer into
* the page, which allows readpage to avoid triggering a duplicate call
* to get_block.
@@ -338,13 +338,10 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
}
/**
- * mpage_readpages - populate an address space with some pages & start reads against them
+ * mpage_readahead - start reads against pages
* @mapping: the address_space
- * @pages: The address of a list_head which contains the target pages. These
- * pages have their ->index populated and are otherwise uninitialised.
- * The page at @pages->prev has the lowest file offset, and reads should be
- * issued in @pages->prev to @pages->next order.
- * @nr_pages: The number of pages at *@...es
+ * @start: The number of the first page to read.
+ * @nr_pages: The number of consecutive pages to read.
* @get_block: The filesystem's block mapper function.
*
* This function walks the pages and the blocks within each page, building and
@@ -381,36 +378,27 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
*
* This all causes the disk requests to be issued in the correct order.
*/
-int
-mpage_readpages(struct address_space *mapping, struct list_head *pages,
- unsigned nr_pages, get_block_t get_block)
+unsigned mpage_readahead(struct address_space *mapping, pgoff_t start,
+ unsigned nr_pages, get_block_t get_block)
{
struct mpage_readpage_args args = {
.get_block = get_block,
.is_readahead = true,
};
- unsigned page_idx;
-
- for (page_idx = 0; page_idx < nr_pages; page_idx++) {
- struct page *page = lru_to_page(pages);
+ while (nr_pages--) {
+ struct page *page = readahead_page(mapping, start++);
prefetchw(&page->flags);
- list_del(&page->lru);
- if (!add_to_page_cache_lru(page, mapping,
- page->index,
- readahead_gfp_mask(mapping))) {
- args.page = page;
- args.nr_pages = nr_pages - page_idx;
- args.bio = do_mpage_readpage(&args);
- }
+ args.page = page;
+ args.nr_pages = nr_pages;
+ args.bio = do_mpage_readpage(&args);
put_page(page);
}
- BUG_ON(!list_empty(pages));
if (args.bio)
mpage_bio_submit(REQ_OP_READ, REQ_RAHEAD, args.bio);
return 0;
}
-EXPORT_SYMBOL(mpage_readpages);
+EXPORT_SYMBOL(mpage_readahead);
/*
* This isn't called much at all
@@ -563,7 +551,7 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
* Page has buffers, but they are all unmapped. The page was
* created by pagein or read over a hole which was handled by
* block_read_full_page(). If this address_space is also
- * using mpage_readpages then this can rarely happen.
+ * using mpage_readahead then this can rarely happen.
*/
goto confused;
}
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 671085512e0f..ecf543f35256 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -146,17 +146,18 @@ static int nilfs_readpage(struct file *file, struct page *page)
}
/**
- * nilfs_readpages() - implement readpages() method of nilfs_aops {}
+ * nilfs_readahead() - implement readahead() method of nilfs_aops {}
* address_space_operations.
* @file - file struct of the file to be read
* @mapping - address_space struct used for reading multiple pages
- * @pages - the pages to be read
+ * @start - the first page to read
* @nr_pages - number of pages to be read
*/
-static int nilfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned int nr_pages)
+static
+unsigned nilfs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned int nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, nilfs_get_block);
}
static int nilfs_writepages(struct address_space *mapping,
@@ -308,7 +309,7 @@ const struct address_space_operations nilfs_aops = {
.readpage = nilfs_readpage,
.writepages = nilfs_writepages,
.set_page_dirty = nilfs_set_page_dirty,
- .readpages = nilfs_readpages,
+ .readahead = nilfs_readahead,
.write_begin = nilfs_write_begin,
.write_end = nilfs_write_end,
/* .releasepage = nilfs_releasepage, */
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 3a67a6518ddf..a9784a6442b7 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -350,14 +350,13 @@ static int ocfs2_readpage(struct file *file, struct page *page)
* grow out to a tree. If need be, detecting boundary extents could
* trivially be added in a future version of ocfs2_get_block().
*/
-static int ocfs2_readpages(struct file *filp, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static
+unsigned ocfs2_readahead(struct file *filp, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- int ret, err = -EIO;
+ int ret;
struct inode *inode = mapping->host;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
- loff_t start;
- struct page *last;
/*
* Use the nonblocking flag for the dlm code to avoid page
@@ -365,36 +364,33 @@ static int ocfs2_readpages(struct file *filp, struct address_space *mapping,
*/
ret = ocfs2_inode_lock_full(inode, NULL, 0, OCFS2_LOCK_NONBLOCK);
if (ret)
- return err;
+ return nr_pages;
- if (down_read_trylock(&oi->ip_alloc_sem) == 0) {
- ocfs2_inode_unlock(inode, 0);
- return err;
- }
+ if (down_read_trylock(&oi->ip_alloc_sem) == 0)
+ goto out_unlock;
/*
* Don't bother with inline-data. There isn't anything
* to read-ahead in that case anyway...
*/
if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
- goto out_unlock;
+ goto out_up;
/*
* Check whether a remote node truncated this file - we just
* drop out in that case as it's not worth handling here.
*/
- last = lru_to_page(pages);
- start = (loff_t)last->index << PAGE_SHIFT;
if (start >= i_size_read(inode))
- goto out_unlock;
+ goto out_up;
- err = mpage_readpages(mapping, pages, nr_pages, ocfs2_get_block);
+ nr_pages = mpage_readahead(mapping, start, nr_pages, ocfs2_get_block);
-out_unlock:
+out_up:
up_read(&oi->ip_alloc_sem);
+out_unlock:
ocfs2_inode_unlock(inode, 0);
- return err;
+ return nr_pages;
}
/* Note: Because we don't support holes, our allocation has
@@ -2474,7 +2470,7 @@ static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
const struct address_space_operations ocfs2_aops = {
.readpage = ocfs2_readpage,
- .readpages = ocfs2_readpages,
+ .readahead = ocfs2_readahead,
.writepage = ocfs2_writepage,
.write_begin = ocfs2_write_begin,
.write_end = ocfs2_write_end,
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index d640b9388238..e7392f49f619 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -289,10 +289,10 @@ static int omfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, omfs_get_block);
}
-static int omfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned omfs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, omfs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, omfs_get_block);
}
static int omfs_writepage(struct page *page, struct writeback_control *wbc)
@@ -373,7 +373,7 @@ const struct inode_operations omfs_file_inops = {
const struct address_space_operations omfs_aops = {
.readpage = omfs_readpage,
- .readpages = omfs_readpages,
+ .readahead = omfs_readahead,
.writepage = omfs_writepage,
.writepages = omfs_writepages,
.write_begin = omfs_write_begin,
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index 345db56c98fd..949e823a1d30 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -99,10 +99,10 @@ static int qnx6_readpage(struct file *file, struct page *page)
return mpage_readpage(page, qnx6_get_block);
}
-static int qnx6_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned qnx6_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, qnx6_get_block);
+ return mpage_readahead(mapping, start, nr_pages, qnx6_get_block);
}
/*
@@ -499,7 +499,7 @@ static sector_t qnx6_bmap(struct address_space *mapping, sector_t block)
}
static const struct address_space_operations qnx6_aops = {
.readpage = qnx6_readpage,
- .readpages = qnx6_readpages,
+ .readahead = qnx6_readahead,
.bmap = qnx6_bmap
};
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 6419e6dacc39..0f2666ef23dd 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1160,11 +1160,11 @@ int reiserfs_get_block(struct inode *inode, sector_t block,
return retval;
}
-static int
-reiserfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned
+reiserfs_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
+ return mpage_readahead(mapping, start, nr_pages, reiserfs_get_block);
}
/*
@@ -3434,7 +3434,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
const struct address_space_operations reiserfs_address_space_operations = {
.writepage = reiserfs_writepage,
.readpage = reiserfs_readpage,
- .readpages = reiserfs_readpages,
+ .readahead = reiserfs_readahead,
.releasepage = reiserfs_releasepage,
.invalidatepage = reiserfs_invalidatepage,
.write_begin = reiserfs_write_begin,
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index e875bc5668ee..97c9bccf1be4 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -195,10 +195,10 @@ static int udf_readpage(struct file *file, struct page *page)
return mpage_readpage(page, udf_get_block);
}
-static int udf_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static unsigned udf_readahead(struct file *file, struct address_space *mapping,
+ pgoff_t start, unsigned nr_pages)
{
- return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
+ return mpage_readahead(mapping, start, nr_pages, udf_get_block);
}
static int udf_write_begin(struct file *file, struct address_space *mapping,
@@ -234,7 +234,7 @@ static sector_t udf_bmap(struct address_space *mapping, sector_t block)
const struct address_space_operations udf_aops = {
.readpage = udf_readpage,
- .readpages = udf_readpages,
+ .readahead = udf_readahead,
.writepage = udf_writepage,
.writepages = udf_writepages,
.write_begin = udf_write_begin,
diff --git a/include/linux/mpage.h b/include/linux/mpage.h
index 001f1fcf9836..dabf7b5a6a28 100644
--- a/include/linux/mpage.h
+++ b/include/linux/mpage.h
@@ -14,7 +14,7 @@
struct writeback_control;
-int mpage_readpages(struct address_space *mapping, struct list_head *pages,
+unsigned mpage_readahead(struct address_space *mapping, pgoff_t start,
unsigned nr_pages, get_block_t get_block);
int mpage_readpage(struct page *page, get_block_t get_block);
int mpage_writepages(struct address_space *mapping,
diff --git a/mm/migrate.c b/mm/migrate.c
index edf42ed90030..860925dd2725 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1020,7 +1020,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
* to the LRU. Later, when the IO completes the pages are
* marked uptodate and unlocked. However, the queueing
* could be merging multiple pages for one bio (e.g.
- * mpage_readpages). If an allocation happens for the
+ * mpage_readahead). If an allocation happens for the
* second or third page, the process can end up locking
* the same page twice and deadlocking. Rather than
* trying to be clever about what pages can be locked,
--
2.24.1
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