From b33d2e535f9b2a1c4210cfc4843ac0dbacbeebcc Mon Sep 17 00:00:00 2001 From: David Sterba Date: Thu, 14 Sep 2023 16:24:43 +0200 Subject: btrfs: add helpers to get fs_info from page/folio pointers Add convenience helpers to get a fs_info from a page or folio pointer instead of open coding the chain or using btrfs_sb() that in some cases does one more pointer hop. This is implemented as a macro (still with type checking) so we don't need full definitions of struct page, folio, btrfs_root and btrfs_fs_info. The latter can't be static inlines as this would create loop between ctree.h <-> fs.h, or the headers would have to be restructured. Reviewed-by: Johannes Thumshirn Reviewed-by: Anand Jain Signed-off-by: David Sterba --- fs/btrfs/compression.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/btrfs/compression.c') diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 488089acd49f..9cae8542c7e0 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -1036,7 +1036,7 @@ static int btrfs_decompress_bio(struct compressed_bio *cb) int btrfs_decompress(int type, const u8 *data_in, struct page *dest_page, unsigned long dest_pgoff, size_t srclen, size_t destlen) { - struct btrfs_fs_info *fs_info = btrfs_sb(dest_page->mapping->host->i_sb); + struct btrfs_fs_info *fs_info = page_to_fs_info(dest_page); struct list_head *workspace; const u32 sectorsize = fs_info->sectorsize; int ret; -- cgit v1.2.3-70-g09d2