On Fri, Jun 27, 2025 at 09:02:36AM +0200, Christoph Hellwig wrote: > Replace ->map_blocks with a new ->writeback_range, which differs in the > following ways: > > - it must also queue up the I/O for writeback, that is called into the > slightly refactored and extended in scope iomap_add_to_ioend for > each region > - can handle only a part of the requested region, that is the retry > loop for partial mappings moves to the caller > - handles cleanup on failures as well, and thus also replaces the > discard_folio method only implemented by XFS. > > This will allow to use the iomap writeback code also for file systems > that are not block based like fuse. > > Co-developed-by: Joanne Koong <joannelkoong@xxxxxxxxx> > Signed-off-by: Joanne Koong <joannelkoong@xxxxxxxxx> > Signed-off-by: Christoph Hellwig <hch@xxxxxx> Same feedback as I had for https://lore.kernel.org/linux-fsdevel/20250702155713.GU10009@frogsfrogsfrogs/T/#m49871dc457a9a9a418d05e9bde6d9a196a858f31 --D > --- > .../filesystems/iomap/operations.rst | 23 +--- > block/fops.c | 25 ++-- > fs/gfs2/bmap.c | 26 ++-- > fs/iomap/buffered-io.c | 93 ++++++------- > fs/iomap/trace.h | 2 +- > fs/xfs/xfs_aops.c | 128 +++++++++++------- > fs/zonefs/file.c | 28 ++-- > include/linux/iomap.h | 20 ++- > 8 files changed, 183 insertions(+), 162 deletions(-) > > diff --git a/Documentation/filesystems/iomap/operations.rst b/Documentation/filesystems/iomap/operations.rst > index 52c2e23e0e76..3c7989ee84ff 100644 > --- a/Documentation/filesystems/iomap/operations.rst > +++ b/Documentation/filesystems/iomap/operations.rst > @@ -271,7 +271,7 @@ writeback. > It does not lock ``i_rwsem`` or ``invalidate_lock``. > > The dirty bit will be cleared for all folios run through the > -``->map_blocks`` machinery described below even if the writeback fails. > +``->writeback_range`` machinery described below even if the writeback fails. > This is to prevent dirty folio clots when storage devices fail; an > ``-EIO`` is recorded for userspace to collect via ``fsync``. > > @@ -283,15 +283,14 @@ The ``ops`` structure must be specified and is as follows: > .. code-block:: c > > struct iomap_writeback_ops { > - int (*map_blocks)(struct iomap_writeback_ctx *wpc, struct inode *inode, > - loff_t offset, unsigned len); > - int (*submit_ioend)(struct iomap_writeback_ctx *wpc, int status); > - void (*discard_folio)(struct folio *folio, loff_t pos); > + int (*writeback_range)(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 pos, unsigned int len, u64 end_pos); > + int (*submit_ioend)(struct iomap_writeback_ctx *wpc, int status); > }; > > The fields are as follows: > > - - ``map_blocks``: Sets ``wpc->iomap`` to the space mapping of the file > + - ``writeback_range``: Sets ``wpc->iomap`` to the space mapping of the file > range (in bytes) given by ``offset`` and ``len``. > iomap calls this function for each dirty fs block in each dirty folio, > though it will `reuse mappings > @@ -316,18 +315,6 @@ The fields are as follows: > transactions from process context before submitting the bio. > This function is optional. > > - - ``discard_folio``: iomap calls this function after ``->map_blocks`` > - fails to schedule I/O for any part of a dirty folio. > - The function should throw away any reservations that may have been > - made for the write. > - The folio will be marked clean and an ``-EIO`` recorded in the > - pagecache. > - Filesystems can use this callback to `remove > - <https://lore.kernel.org/all/20201029163313.1766967-1-bfoster@xxxxxxxxxx/>`_ > - delalloc reservations to avoid having delalloc reservations for > - clean pagecache. > - This function is optional. > - > Pagecache Writeback Completion > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > diff --git a/block/fops.c b/block/fops.c > index 00af678aaa3a..692be63a4aa0 100644 > --- a/block/fops.c > +++ b/block/fops.c > @@ -537,22 +537,29 @@ static void blkdev_readahead(struct readahead_control *rac) > iomap_readahead(rac, &blkdev_iomap_ops); > } > > -static int blkdev_map_blocks(struct iomap_writeback_ctx *wpc, > - struct inode *inode, loff_t offset, unsigned int len) > +static ssize_t blkdev_writeback_range(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 offset, unsigned int len, u64 end_pos) > { > - loff_t isize = i_size_read(inode); > + loff_t isize = i_size_read(wpc->inode); > > if (WARN_ON_ONCE(offset >= isize)) > return -EIO; > - if (offset >= wpc->iomap.offset && > - offset < wpc->iomap.offset + wpc->iomap.length) > - return 0; > - return blkdev_iomap_begin(inode, offset, isize - offset, > - IOMAP_WRITE, &wpc->iomap, NULL); > + > + if (offset < wpc->iomap.offset || > + offset >= wpc->iomap.offset + wpc->iomap.length) { > + int error; > + > + error = blkdev_iomap_begin(wpc->inode, offset, isize - offset, > + IOMAP_WRITE, &wpc->iomap, NULL); > + if (error) > + return error; > + } > + > + return iomap_add_to_ioend(wpc, folio, offset, end_pos, len); > } > > static const struct iomap_writeback_ops blkdev_writeback_ops = { > - .map_blocks = blkdev_map_blocks, > + .writeback_range = blkdev_writeback_range, > }; > > static int blkdev_writepages(struct address_space *mapping, > diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c > index 77a505e7a017..ff72e04a4788 100644 > --- a/fs/gfs2/bmap.c > +++ b/fs/gfs2/bmap.c > @@ -2469,23 +2469,25 @@ int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length) > return error; > } > > -static int gfs2_map_blocks(struct iomap_writeback_ctx *wpc, struct inode *inode, > - loff_t offset, unsigned int len) > +static ssize_t gfs2_writeback_range(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 offset, unsigned int len, u64 end_pos) > { > - int ret; > - > - if (WARN_ON_ONCE(gfs2_is_stuffed(GFS2_I(inode)))) > + if (WARN_ON_ONCE(gfs2_is_stuffed(GFS2_I(wpc->inode)))) > return -EIO; > > - if (offset >= wpc->iomap.offset && > - offset < wpc->iomap.offset + wpc->iomap.length) > - return 0; > + if (offset < wpc->iomap.offset || > + offset >= wpc->iomap.offset + wpc->iomap.length) { > + int ret; > > - memset(&wpc->iomap, 0, sizeof(wpc->iomap)); > - ret = gfs2_iomap_get(inode, offset, INT_MAX, &wpc->iomap); > - return ret; > + memset(&wpc->iomap, 0, sizeof(wpc->iomap)); > + ret = gfs2_iomap_get(wpc->inode, offset, INT_MAX, &wpc->iomap); > + if (ret) > + return ret; > + } > + > + return iomap_add_to_ioend(wpc, folio, offset, end_pos, len); > } > > const struct iomap_writeback_ops gfs2_writeback_ops = { > - .map_blocks = gfs2_map_blocks, > + .writeback_range = gfs2_writeback_range, > }; > diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c > index ec2f70c6ec33..a54b14817cd0 100644 > --- a/fs/iomap/buffered-io.c > +++ b/fs/iomap/buffered-io.c > @@ -1676,14 +1676,30 @@ static bool iomap_can_add_to_ioend(struct iomap_writeback_ctx *wpc, loff_t pos, > * At the end of a writeback pass, there will be a cached ioend remaining on the > * writepage context that the caller will need to submit. > */ > -static int iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, > - struct folio *folio, loff_t pos, loff_t end_pos, unsigned len) > +ssize_t iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, struct folio *folio, > + loff_t pos, loff_t end_pos, unsigned int dirty_len) > { > struct iomap_folio_state *ifs = folio->private; > size_t poff = offset_in_folio(folio, pos); > unsigned int ioend_flags = 0; > + unsigned int map_len = min_t(u64, dirty_len, > + wpc->iomap.offset + wpc->iomap.length - pos); > int error; > > + trace_iomap_add_to_ioend(wpc->inode, pos, dirty_len, &wpc->iomap); > + > + WARN_ON_ONCE(!folio->private && map_len < dirty_len); > + > + switch (wpc->iomap.type) { > + case IOMAP_INLINE: > + WARN_ON_ONCE(1); > + return -EIO; > + case IOMAP_HOLE: > + return map_len; > + default: > + break; > + } > + > if (wpc->iomap.type == IOMAP_UNWRITTEN) > ioend_flags |= IOMAP_IOEND_UNWRITTEN; > if (wpc->iomap.flags & IOMAP_F_SHARED) > @@ -1701,11 +1717,11 @@ static int iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, > wpc->ioend = iomap_alloc_ioend(wpc, pos, ioend_flags); > } > > - if (!bio_add_folio(&wpc->ioend->io_bio, folio, len, poff)) > + if (!bio_add_folio(&wpc->ioend->io_bio, folio, map_len, poff)) > goto new_ioend; > > if (ifs) > - atomic_add(len, &ifs->write_bytes_pending); > + atomic_add(map_len, &ifs->write_bytes_pending); > > /* > * Clamp io_offset and io_size to the incore EOF so that ondisk > @@ -1748,63 +1764,34 @@ static int iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, > * Note that this defeats the ability to chain the ioends of > * appending writes. > */ > - wpc->ioend->io_size += len; > + wpc->ioend->io_size += map_len; > if (wpc->ioend->io_offset + wpc->ioend->io_size > end_pos) > wpc->ioend->io_size = end_pos - wpc->ioend->io_offset; > > - wbc_account_cgroup_owner(wpc->wbc, folio, len); > - return 0; > + wbc_account_cgroup_owner(wpc->wbc, folio, map_len); > + return map_len; > } > +EXPORT_SYMBOL_GPL(iomap_add_to_ioend); > > -static int iomap_writepage_map_blocks(struct iomap_writeback_ctx *wpc, > - struct folio *folio, u64 pos, u64 end_pos, unsigned dirty_len, > +static int iomap_writeback_range(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 pos, u32 rlen, u64 end_pos, > bool *wb_pending) > { > - int error; > - > do { > - unsigned map_len; > - > - error = wpc->ops->map_blocks(wpc, wpc->inode, pos, dirty_len); > - if (error) > - break; > - trace_iomap_writepage_map(wpc->inode, pos, dirty_len, > - &wpc->iomap); > - > - map_len = min_t(u64, dirty_len, > - wpc->iomap.offset + wpc->iomap.length - pos); > - WARN_ON_ONCE(!folio->private && map_len < dirty_len); > + ssize_t ret; > > - switch (wpc->iomap.type) { > - case IOMAP_INLINE: > - WARN_ON_ONCE(1); > - error = -EIO; > - break; > - case IOMAP_HOLE: > - break; > - default: > - error = iomap_add_to_ioend(wpc, folio, pos, end_pos, > - map_len); > - if (!error) > - *wb_pending = true; > - break; > - } > - dirty_len -= map_len; > - pos += map_len; > - } while (dirty_len && !error); > + ret = wpc->ops->writeback_range(wpc, folio, pos, rlen, end_pos); > + if (WARN_ON_ONCE(ret == 0 || ret > rlen)) > + return -EIO; > + if (ret < 0) > + return ret; > + rlen -= ret; > + pos += ret; > + if (wpc->iomap.type != IOMAP_HOLE) > + *wb_pending = true; > + } while (rlen); > > - /* > - * We cannot cancel the ioend directly here on error. We may have > - * already set other pages under writeback and hence we have to run I/O > - * completion to mark the error state of the pages under writeback > - * appropriately. > - * > - * Just let the file system know what portion of the folio failed to > - * map. > - */ > - if (error && wpc->ops->discard_folio) > - wpc->ops->discard_folio(folio, pos); > - return error; > + return 0; > } > > /* > @@ -1916,8 +1903,8 @@ static int iomap_writepage_map(struct iomap_writeback_ctx *wpc, > */ > end_aligned = round_up(end_pos, i_blocksize(inode)); > while ((rlen = iomap_find_dirty_range(folio, &pos, end_aligned))) { > - error = iomap_writepage_map_blocks(wpc, folio, pos, end_pos, > - rlen, &wb_pending); > + error = iomap_writeback_range(wpc, folio, pos, rlen, end_pos, > + &wb_pending); > if (error) > break; > pos += rlen; > diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h > index 455cc6f90be0..aaea02c9560a 100644 > --- a/fs/iomap/trace.h > +++ b/fs/iomap/trace.h > @@ -169,7 +169,7 @@ DEFINE_EVENT(iomap_class, name, \ > DEFINE_IOMAP_EVENT(iomap_iter_dstmap); > DEFINE_IOMAP_EVENT(iomap_iter_srcmap); > > -TRACE_EVENT(iomap_writepage_map, > +TRACE_EVENT(iomap_add_to_ioend, > TP_PROTO(struct inode *inode, u64 pos, unsigned int dirty_len, > struct iomap *iomap), > TP_ARGS(inode, pos, dirty_len, iomap), > diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c > index 81040b57a844..ce4ed03db21d 100644 > --- a/fs/xfs/xfs_aops.c > +++ b/fs/xfs/xfs_aops.c > @@ -233,6 +233,47 @@ xfs_end_bio( > spin_unlock_irqrestore(&ip->i_ioend_lock, flags); > } > > +/* > + * We cannot cancel the ioend directly on error. We may have already set other > + * pages under writeback and hence we have to run I/O completion to mark the > + * error state of the pages under writeback appropriately. > + * > + * If the folio has delalloc blocks on it, the caller is asking us to punch them > + * out. If we don't, we can leave a stale delalloc mapping covered by a clean > + * page that needs to be dirtied again before the delalloc mapping can be > + * converted. This stale delalloc mapping can trip up a later direct I/O read > + * operation on the same region. > + * > + * We prevent this by truncating away the delalloc regions on the folio. Because > + * they are delalloc, we can do this without needing a transaction. Indeed - if > + * we get ENOSPC errors, we have to be able to do this truncation without a > + * transaction as there is no space left for block reservation (typically why > + * we see a ENOSPC in writeback). > + */ > +static void > +xfs_discard_folio( > + struct folio *folio, > + loff_t pos) > +{ > + struct xfs_inode *ip = XFS_I(folio->mapping->host); > + struct xfs_mount *mp = ip->i_mount; > + > + if (xfs_is_shutdown(mp)) > + return; > + > + xfs_alert_ratelimited(mp, > + "page discard on page "PTR_FMT", inode 0x%llx, pos %llu.", > + folio, ip->i_ino, pos); > + > + /* > + * The end of the punch range is always the offset of the first > + * byte of the next folio. Hence the end offset is only dependent on the > + * folio itself and not the start offset that is passed in. > + */ > + xfs_bmap_punch_delalloc_range(ip, XFS_DATA_FORK, pos, > + folio_pos(folio) + folio_size(folio), NULL); > +} > + > /* > * Fast revalidation of the cached writeback mapping. Return true if the current > * mapping is valid, false otherwise. > @@ -278,13 +319,12 @@ xfs_imap_valid( > static int > xfs_map_blocks( > struct iomap_writeback_ctx *wpc, > - struct inode *inode, > loff_t offset, > unsigned int len) > { > - struct xfs_inode *ip = XFS_I(inode); > + struct xfs_inode *ip = XFS_I(wpc->inode); > struct xfs_mount *mp = ip->i_mount; > - ssize_t count = i_blocksize(inode); > + ssize_t count = i_blocksize(wpc->inode); > xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset); > xfs_fileoff_t end_fsb = XFS_B_TO_FSB(mp, offset + count); > xfs_fileoff_t cow_fsb; > @@ -436,6 +476,24 @@ xfs_map_blocks( > return 0; > } > > +static ssize_t > +xfs_writeback_range( > + struct iomap_writeback_ctx *wpc, > + struct folio *folio, > + u64 offset, > + unsigned int len, > + u64 end_pos) > +{ > + ssize_t ret; > + > + ret = xfs_map_blocks(wpc, offset, len); > + if (!ret) > + ret = iomap_add_to_ioend(wpc, folio, offset, end_pos, len); > + if (ret < 0) > + xfs_discard_folio(folio, offset); > + return ret; > +} > + > static bool > xfs_ioend_needs_wq_completion( > struct iomap_ioend *ioend) > @@ -488,47 +546,9 @@ xfs_submit_ioend( > return 0; > } > > -/* > - * If the folio has delalloc blocks on it, the caller is asking us to punch them > - * out. If we don't, we can leave a stale delalloc mapping covered by a clean > - * page that needs to be dirtied again before the delalloc mapping can be > - * converted. This stale delalloc mapping can trip up a later direct I/O read > - * operation on the same region. > - * > - * We prevent this by truncating away the delalloc regions on the folio. Because > - * they are delalloc, we can do this without needing a transaction. Indeed - if > - * we get ENOSPC errors, we have to be able to do this truncation without a > - * transaction as there is no space left for block reservation (typically why > - * we see a ENOSPC in writeback). > - */ > -static void > -xfs_discard_folio( > - struct folio *folio, > - loff_t pos) > -{ > - struct xfs_inode *ip = XFS_I(folio->mapping->host); > - struct xfs_mount *mp = ip->i_mount; > - > - if (xfs_is_shutdown(mp)) > - return; > - > - xfs_alert_ratelimited(mp, > - "page discard on page "PTR_FMT", inode 0x%llx, pos %llu.", > - folio, ip->i_ino, pos); > - > - /* > - * The end of the punch range is always the offset of the first > - * byte of the next folio. Hence the end offset is only dependent on the > - * folio itself and not the start offset that is passed in. > - */ > - xfs_bmap_punch_delalloc_range(ip, XFS_DATA_FORK, pos, > - folio_pos(folio) + folio_size(folio), NULL); > -} > - > static const struct iomap_writeback_ops xfs_writeback_ops = { > - .map_blocks = xfs_map_blocks, > + .writeback_range = xfs_writeback_range, > .submit_ioend = xfs_submit_ioend, > - .discard_folio = xfs_discard_folio, > }; > > struct xfs_zoned_writepage_ctx { > @@ -545,11 +565,10 @@ XFS_ZWPC(struct iomap_writeback_ctx *ctx) > static int > xfs_zoned_map_blocks( > struct iomap_writeback_ctx *wpc, > - struct inode *inode, > loff_t offset, > unsigned int len) > { > - struct xfs_inode *ip = XFS_I(inode); > + struct xfs_inode *ip = XFS_I(wpc->inode); > struct xfs_mount *mp = ip->i_mount; > xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset); > xfs_fileoff_t end_fsb = XFS_B_TO_FSB(mp, offset + len); > @@ -608,6 +627,24 @@ xfs_zoned_map_blocks( > return 0; > } > > +static ssize_t > +xfs_zoned_writeback_range( > + struct iomap_writeback_ctx *wpc, > + struct folio *folio, > + u64 offset, > + unsigned int len, > + u64 end_pos) > +{ > + ssize_t ret; > + > + ret = xfs_zoned_map_blocks(wpc, offset, len); > + if (!ret) > + ret = iomap_add_to_ioend(wpc, folio, offset, end_pos, len); > + if (ret < 0) > + xfs_discard_folio(folio, offset); > + return ret; > +} > + > static int > xfs_zoned_submit_ioend( > struct iomap_writeback_ctx *wpc, > @@ -621,9 +658,8 @@ xfs_zoned_submit_ioend( > } > > static const struct iomap_writeback_ops xfs_zoned_writeback_ops = { > - .map_blocks = xfs_zoned_map_blocks, > + .writeback_range = xfs_zoned_writeback_range, > .submit_ioend = xfs_zoned_submit_ioend, > - .discard_folio = xfs_discard_folio, > }; > > STATIC int > diff --git a/fs/zonefs/file.c b/fs/zonefs/file.c > index 5a4b9f2711a9..cb3d380c4651 100644 > --- a/fs/zonefs/file.c > +++ b/fs/zonefs/file.c > @@ -124,29 +124,33 @@ static void zonefs_readahead(struct readahead_control *rac) > * Map blocks for page writeback. This is used only on conventional zone files, > * which implies that the page range can only be within the fixed inode size. > */ > -static int zonefs_write_map_blocks(struct iomap_writeback_ctx *wpc, > - struct inode *inode, loff_t offset, > - unsigned int len) > +static ssize_t zonefs_writeback_range(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 offset, unsigned len, u64 end_pos) > { > - struct zonefs_zone *z = zonefs_inode_zone(inode); > + struct zonefs_zone *z = zonefs_inode_zone(wpc->inode); > > if (WARN_ON_ONCE(zonefs_zone_is_seq(z))) > return -EIO; > - if (WARN_ON_ONCE(offset >= i_size_read(inode))) > + if (WARN_ON_ONCE(offset >= i_size_read(wpc->inode))) > return -EIO; > > /* If the mapping is already OK, nothing needs to be done */ > - if (offset >= wpc->iomap.offset && > - offset < wpc->iomap.offset + wpc->iomap.length) > - return 0; > + if (offset < wpc->iomap.offset || > + offset >= wpc->iomap.offset + wpc->iomap.length) { > + int error; > + > + error = zonefs_write_iomap_begin(wpc->inode, offset, > + z->z_capacity - offset, IOMAP_WRITE, > + &wpc->iomap, NULL); > + if (error) > + return error; > + } > > - return zonefs_write_iomap_begin(inode, offset, > - z->z_capacity - offset, > - IOMAP_WRITE, &wpc->iomap, NULL); > + return iomap_add_to_ioend(wpc, folio, offset, end_pos, len); > } > > static const struct iomap_writeback_ops zonefs_writeback_ops = { > - .map_blocks = zonefs_write_map_blocks, > + .writeback_range = zonefs_writeback_range, > }; > > static int zonefs_writepages(struct address_space *mapping, > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > index 778d99f45ef1..e346475a023d 100644 > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -416,18 +416,20 @@ static inline struct iomap_ioend *iomap_ioend_from_bio(struct bio *bio) > > struct iomap_writeback_ops { > /* > - * Required, maps the blocks so that writeback can be performed on > - * the range starting at offset. > + * Required, performs writeback on the passed in range > * > - * Can return arbitrarily large regions, but we need to call into it at > + * Can map arbitrarily large regions, but we need to call into it at > * least once per folio to allow the file systems to synchronize with > * the write path that could be invalidating mappings. > * > * An existing mapping from a previous call to this method can be reused > * by the file system if it is still valid. > + * > + * Returns the number of bytes processed or a negative errno. > */ > - int (*map_blocks)(struct iomap_writeback_ctx *wpc, struct inode *inode, > - loff_t offset, unsigned len); > + ssize_t (*writeback_range)(struct iomap_writeback_ctx *wpc, > + struct folio *folio, u64 pos, unsigned int len, > + u64 end_pos); > > /* > * Optional, allows the file systems to hook into bio submission, > @@ -438,12 +440,6 @@ struct iomap_writeback_ops { > * the bio could not be submitted. > */ > int (*submit_ioend)(struct iomap_writeback_ctx *wpc, int status); > - > - /* > - * Optional, allows the file system to discard state on a page where > - * we failed to submit any I/O. > - */ > - void (*discard_folio)(struct folio *folio, loff_t pos); > }; > > struct iomap_writeback_ctx { > @@ -463,6 +459,8 @@ void iomap_finish_ioends(struct iomap_ioend *ioend, int error); > void iomap_ioend_try_merge(struct iomap_ioend *ioend, > struct list_head *more_ioends); > void iomap_sort_ioends(struct list_head *ioend_list); > +ssize_t iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, struct folio *folio, > + loff_t pos, loff_t end_pos, unsigned int dirty_len); > int iomap_writepages(struct iomap_writeback_ctx *wpc); > > /* > -- > 2.47.2 > >
