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btrfs: Remove extent_io_ops::writepage_start_hook

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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, int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
u64 start, u64 end, int *page_started, unsigned long *nr_written, u64 start, u64 end, int *page_started, unsigned long *nr_written,
struct writeback_control *wbc); struct writeback_control *wbc);
int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
extern const struct dentry_operations btrfs_dentry_operations; extern const struct dentry_operations btrfs_dentry_operations;
/* ioctl.c */ /* ioctl.c */

5
fs/btrfs/extent_io.c
View file

@ -3321,9 +3321,7 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
int nr = 0; int nr = 0;
bool compressed; bool compressed;
if (tree->ops && tree->ops->writepage_start_hook) { ret = btrfs_writepage_cow_fixup(page, start, page_end);
ret = tree->ops->writepage_start_hook(page, start,
page_end);
if (ret) { if (ret) {
/* Fixup worker will requeue */ /* Fixup worker will requeue */
if (ret == -EBUSY) if (ret == -EBUSY)
@ -3335,7 +3333,6 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
unlock_page(page); unlock_page(page);
return 1; return 1;
} }
}
/* /*
* we don't want to touch the inode after unlocking the page, * we don't want to touch the inode after unlocking the page,

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 * 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, void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
struct extent_state *state, int uptodate); struct extent_state *state, int uptodate);
void (*set_bit_hook)(void *private_data, struct extent_state *state, 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 * to fix it up. The async helper will wait for ordered extents, set
* the delalloc bit and make it safe to write the page. * 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 inode *inode = page->mapping->host;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); 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 */ /* optional callbacks */
.writepage_end_io_hook = btrfs_writepage_end_io_hook, .writepage_end_io_hook = btrfs_writepage_end_io_hook,
.writepage_start_hook = btrfs_writepage_start_hook,
.set_bit_hook = btrfs_set_bit_hook, .set_bit_hook = btrfs_set_bit_hook,
.clear_bit_hook = btrfs_clear_bit_hook, .clear_bit_hook = btrfs_clear_bit_hook,
.merge_extent_hook = btrfs_merge_extent_hook, .merge_extent_hook = btrfs_merge_extent_hook,