[RFC PATCH 3/9] btrfs: use set/clear_fs_page_private

Guoqing Jiang
2020-04-26T21:50:19Z

Since the new pair function is introduced, we can call them to clean the
code in btrfs.

Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: David Sterba <dsterba@suse.com>
Cc: linux-btrfs@vger.kernel.org
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
---
fs/btrfs/disk-io.c | 4 +---
fs/btrfs/extent_io.c | 21 ++++++---------------
fs/btrfs/inode.c | 17 ++++-------------
3 files changed, 11 insertions(+), 31 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index a6cb5cbbdb9f..1230863e80f9 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -980,9 +980,7 @@ static void btree_invalidatepage(struct page *page, unsigned int offset,
btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info,
"page private not zero on page %llu",
(unsigned long long)page_offset(page));
- ClearPagePrivate(page);
- set_page_private(page, 0);
- put_page(page);
+ clear_fs_page_private(page);
}
}

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 39e45b8a5031..de8c2d5a99db 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3076,22 +3076,16 @@ static int submit_extent_page(unsigned int opf,
static void attach_extent_buffer_page(struct extent_buffer *eb,
struct page *page)
{
- if (!PagePrivate(page)) {
- SetPagePrivate(page);
- get_page(page);
- set_page_private(page, (unsigned long)eb);
- } else {
+ if (!PagePrivate(page))
+ set_fs_page_private(page, eb);
+ else
WARN_ON(page->private != (unsigned long)eb);
- }
}

void set_page_extent_mapped(struct page *page)
{
- if (!PagePrivate(page)) {
- SetPagePrivate(page);
- get_page(page);
- set_page_private(page, EXTENT_PAGE_PRIVATE);
- }
+ if (!PagePrivate(page))
+ set_fs_page_private(page, (void *)EXTENT_PAGE_PRIVATE);
}

static struct extent_map *
@@ -4929,10 +4923,7 @@ static void btrfs_release_extent_buffer_pages(struct extent_buffer *eb)
* We need to make sure we haven't be attached
* to a new eb.
*/
- ClearPagePrivate(page);
- set_page_private(page, 0);
- /* One for the page private */
- put_page(page);
+ clear_fs_page_private(page);
}

if (mapped)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 320d1062068d..07871c57ba96 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8303,11 +8303,8 @@ btrfs_readpages(struct file *file, struct address_space *mapping,
static int __btrfs_releasepage(struct page *page, gfp_t gfp_flags)
{
int ret = try_release_extent_mapping(page, gfp_flags);
- if (ret == 1) {
- ClearPagePrivate(page);
- set_page_private(page, 0);
- put_page(page);
- }
+ if (ret == 1)
+ clear_fs_page_private(page);
return ret;
}

@@ -8331,11 +8328,9 @@ static int btrfs_migratepage(struct address_space *mapping,

if (page_has_private(page)) {
ClearPagePrivate(page);
- get_page(newpage);
- set_page_private(newpage, page_private(page));
+ set_fs_page_private(newpage, (void *)page_private(page));
set_page_private(page, 0);
put_page(page);
- SetPagePrivate(newpage);
}

if (PagePrivate2(page)) {
@@ -8458,11 +8453,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
}

ClearPageChecked(page);
- if (PagePrivate(page)) {
- ClearPagePrivate(page);
- set_page_private(page, 0);
- put_page(page);
- }
+ clear_fs_page_private(page);
}

/*
--
2.17.1