On Fri, Jun 07, 2024 at 10:10:52PM +0800, Chao Yu wrote: > On 2024/6/7 21:33, Matthew Wilcox wrote: > > On Fri, Jun 07, 2024 at 06:18:29PM +0800, Chao Yu wrote: > > > @@ -1990,6 +1989,12 @@ static inline struct f2fs_super_block > > > *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) > > > return (struct f2fs_super_block *)(sbi->raw_super); > > > } > > > +static inline struct f2fs_super_block *F2FS_SUPER_BLOCK(struct folio > > > *folio) > > > +{ > > > + return (struct f2fs_super_block *)(page_address(folio_page(folio, 0)) + > > > + F2FS_SUPER_OFFSET); > > > +} > > > > This assumes that the superblock is in the first page of the folio. > > That's not necessarily guaranteed; let's say you have a 64KiB folio > > that covers the start of the bdev. > > Oh, I missed to add large folio support in this version. > > For the case: page size is 4KiB, and folio size is 64KiB, > read_mapping_folio(mapping, 0, NULL) and read_mapping_folio(mapping, > 1, NULL) will return the same #0 folio, right?
That's right. If you want to pass a page into F2FS_SUPER_BLOCK, that would be fine. Assuming you're not trying to support fs blocksize != PAGE_SIZE. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel