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Joanne Koong <joannelkoong@gmail.com> says: iomap/fuse: add helper to keep uptodate bitmap in sync Filesystems that use iomap normally mark folios uptodate through the iomap read/write paths, which keep iomap's internal uptodate bitmap in sync. However, some filesystems need to write data directly into the page cache outside of those paths (eg fuse, which may need to write server-pushed data straight into the page cache for servicing notify stores). These filesystems need a way to mark a folio uptodate that also updates the iomap bitmap so they're kept in sync. This series adds iomap_folio_mark_uptodate() for filesystems to do that and updates the relevant fuse call paths to use this. This is needed before fuse can enable large folios. Patch 1 ("fuse: don't clear folio uptodate on writethrough errors") was originally submitted to the fuse tree [1] but patch 3 ("fuse: use iomap helper to mark folio uptodate") has a dependency on it, so to make cross-coordination between trees easier, patch 1 is now part of this series and submitted to the vfs tree. [1] https://lore.kernel.org/fuse-devel/20260624205201.842714-1-joannelkoong@gmail.com/ * patches from https://patch.msgid.link/20260707220450.1200943-1-joannelkoong@gmail.com: fuse: use iomap helper to mark folio uptodate iomap: add helper to mark folio uptodate fuse: don't clear folio uptodate on writethrough errors Link: https://patch.msgid.link/20260707220450.1200943-1-joannelkoong@gmail.com Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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