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kill wait_on_page_writeback_range 

All callers really want the more logical filemap_fdatawait_range interface,
so convert them to use it and merge wait_on_page_writeback_range into
filemap_fdatawait_range.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Christoph Hellwig 2009-09-30 22:16:33 +02:00 committed by Jan Kara
parent 6b2f3d1f76
commit 94004ed726
5 changed files with 18 additions and 45 deletions
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2
Documentation/filesystems/vfs.txt
View File

@ -472,7 +472,7 @@ __sync_single_inode) to check if ->writepages has been successful in
writing out the whole address_space.
The Writeback tag is used by filemap*wait* and sync_page* functions,
via wait_on_page_writeback_range, to wait for all writeback to
via filemap_fdatawait_range, to wait for all writeback to
complete. While waiting ->sync_page (if defined) will be called on
each page that is found to require writeback.

2
fs/jbd2/commit.c
View File

@ -286,7 +286,7 @@ static int journal_finish_inode_data_buffers(journal_t *journal,
if (err) {
/*
* Because AS_EIO is cleared by
* wait_on_page_writeback_range(), set it again so
* filemap_fdatawait_range(), set it again so
* that user process can get -EIO from fsync().
*/
set_bit(AS_EIO,

8
fs/sync.c
View File

@ -453,9 +453,7 @@ int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
ret = 0;
if (flags & SYNC_FILE_RANGE_WAIT_BEFORE) {
ret = wait_on_page_writeback_range(mapping,
offset >> PAGE_CACHE_SHIFT,
endbyte >> PAGE_CACHE_SHIFT);
ret = filemap_fdatawait_range(mapping, offset, endbyte);
if (ret < 0)
goto out;
}
@ -468,9 +466,7 @@ int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
}
if (flags & SYNC_FILE_RANGE_WAIT_AFTER) {
ret = wait_on_page_writeback_range(mapping,
offset >> PAGE_CACHE_SHIFT,
endbyte >> PAGE_CACHE_SHIFT);
ret = filemap_fdatawait_range(mapping, offset, endbyte);
}
out:
return ret;

2
include/linux/fs.h
View File

@ -2091,8 +2091,6 @@ extern int filemap_fdatawait_range(struct address_space *, loff_t lstart,
extern int filemap_write_and_wait(struct address_space *mapping);
extern int filemap_write_and_wait_range(struct address_space *mapping,
loff_t lstart, loff_t lend);
extern int wait_on_page_writeback_range(struct address_space *mapping,
pgoff_t start, pgoff_t end);
extern int __filemap_fdatawrite_range(struct address_space *mapping,
loff_t start, loff_t end, int sync_mode);
extern int filemap_fdatawrite_range(struct address_space *mapping,

49
mm/filemap.c
View File

@ -260,27 +260,27 @@ int filemap_flush(struct address_space *mapping)
EXPORT_SYMBOL(filemap_flush);
/**
* wait_on_page_writeback_range - wait for writeback to complete
* @mapping: target address_space
* @start: beginning page index
* @end: ending page index
* filemap_fdatawait_range - wait for writeback to complete
* @mapping: address space structure to wait for
* @start_byte: offset in bytes where the range starts
* @end_byte: offset in bytes where the range ends (inclusive)
*
* Wait for writeback to complete against pages indexed by start->end
* inclusive
* Walk the list of under-writeback pages of the given address space
* in the given range and wait for all of them.
*/
int wait_on_page_writeback_range(struct address_space *mapping,
pgoff_t start, pgoff_t end)
int filemap_fdatawait_range(struct address_space *mapping, loff_t start_byte,
loff_t end_byte)
{
pgoff_t index = start_byte >> PAGE_CACHE_SHIFT;
pgoff_t end = end_byte >> PAGE_CACHE_SHIFT;
struct pagevec pvec;
int nr_pages;
int ret = 0;
pgoff_t index;
if (end < start)
if (end_byte < start_byte)
return 0;
pagevec_init(&pvec, 0);
index = start;
while ((index <= end) &&
(nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
PAGECACHE_TAG_WRITEBACK,
@ -310,25 +310,6 @@ int wait_on_page_writeback_range(struct address_space *mapping,
return ret;
}
/**
* filemap_fdatawait_range - wait for all under-writeback pages to complete in a given range
* @mapping: address space structure to wait for
* @start: offset in bytes where the range starts
* @end: offset in bytes where the range ends (inclusive)
*
* Walk the list of under-writeback pages of the given address space
* in the given range and wait for all of them.
*
* This is just a simple wrapper so that callers don't have to convert offsets
* to page indexes themselves
*/
int filemap_fdatawait_range(struct address_space *mapping, loff_t start,
loff_t end)
{
return wait_on_page_writeback_range(mapping, start >> PAGE_CACHE_SHIFT,
end >> PAGE_CACHE_SHIFT);
}
EXPORT_SYMBOL(filemap_fdatawait_range);
/**
@ -345,8 +326,7 @@ int filemap_fdatawait(struct address_space *mapping)
if (i_size == 0)
return 0;
return wait_on_page_writeback_range(mapping, 0,
(i_size - 1) >> PAGE_CACHE_SHIFT);
return filemap_fdatawait_range(mapping, 0, i_size - 1);
}
EXPORT_SYMBOL(filemap_fdatawait);
@ -393,9 +373,8 @@ int filemap_write_and_wait_range(struct address_space *mapping,
WB_SYNC_ALL);
/* See comment of filemap_write_and_wait() */
if (err != -EIO) {
int err2 = wait_on_page_writeback_range(mapping,
lstart >> PAGE_CACHE_SHIFT,
lend >> PAGE_CACHE_SHIFT);
int err2 = filemap_fdatawait_range(mapping,
lstart, lend);
if (!err)
err = err2;
}