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btrfs: Remove extent_io_ops::writepage_start_hook 

This hook is called only from __extent_writepage_io which is already
called only from the data page writeout path. So there is no need to
make an indirect call via extent_io_ops. This patch just removes the
callback definition, exports the callback function and calls it directly
at the only call site. Also give the function a more descriptive name.
No functional changes.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2018-11-01 14:09:47 +02:00 committed by David Sterba
parent 5eaad97af8
commit d75855b451
4 changed files with 12 additions and 16 deletions
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1
fs/btrfs/ctree.h
View File

@ -3192,6 +3192,7 @@ int btrfs_prealloc_file_range_trans(struct inode *inode,
int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
u64 start, u64 end, int *page_started, unsigned long *nr_written,
struct writeback_control *wbc);
int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
extern const struct dentry_operations btrfs_dentry_operations;
/* ioctl.c */

23
fs/btrfs/extent_io.c
View File

@ -3321,20 +3321,17 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
int nr = 0;
bool compressed;
if (tree->ops && tree->ops->writepage_start_hook) {
ret = tree->ops->writepage_start_hook(page, start,
page_end);
if (ret) {
/* Fixup worker will requeue */
if (ret == -EBUSY)
wbc->pages_skipped++;
else
redirty_page_for_writepage(wbc, page);
ret = btrfs_writepage_cow_fixup(page, start, page_end);
if (ret) {
/* Fixup worker will requeue */
if (ret == -EBUSY)
wbc->pages_skipped++;
else
redirty_page_for_writepage(wbc, page);
update_nr_written(wbc, nr_written);
unlock_page(page);
return 1;
}
update_nr_written(wbc, nr_written);
unlock_page(page);
return 1;
}
/*

1
fs/btrfs/extent_io.h
View File

@ -106,7 +106,6 @@ struct extent_io_ops {
/*
* Optional hooks, called if the pointer is not NULL
*/
int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
struct extent_state *state, int uptodate);
void (*set_bit_hook)(void *private_data, struct extent_state *state,

3
fs/btrfs/inode.c
View File

@ -2152,7 +2152,7 @@ out_page:
* to fix it up. The async helper will wait for ordered extents, set
* the delalloc bit and make it safe to write the page.
*/
static int btrfs_writepage_start_hook(struct page *page, u64 start, u64 end)
int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end)
{
struct inode *inode = page->mapping->host;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
@ -10527,7 +10527,6 @@ static const struct extent_io_ops btrfs_extent_io_ops = {
/* optional callbacks */
.writepage_end_io_hook = btrfs_writepage_end_io_hook,
.writepage_start_hook = btrfs_writepage_start_hook,
.set_bit_hook = btrfs_set_bit_hook,
.clear_bit_hook = btrfs_clear_bit_hook,
.merge_extent_hook = btrfs_merge_extent_hook,