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>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 3a4d19e..a10240f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -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 */
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dbc4202..6cec272 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -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;
}
/*
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index ca48187..4275a10 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -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,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index afc8704..2fa1a25 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2152,7 +2152,7 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
* 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,