Re: [PATCH v4 0/5] iomap: trivial fixes for ext4 conversion

["Theodore Tso" <tytso@mit.edu>]

Hi Christian,

These fixes are needed for landing support for buffered writes using
iomap in ext4.  That won't be ready to land this development cycle,
but could we land these fixes now?

Thanks,

						- Ted

On Tue, Jul 14, 2026 at 04:23:20PM -0500, Zhang Yi wrote:
> Hi,
> 
> This is v4 of the trivial iomap fixes for the ext4 conversion. There are
> no code changes relative to v3, the only update is the addition of a
> Fixes tag in patch 03.
> 
> Changes since v3:
>  - Collect RVB tags from Christoph.
>  - Add fix tag in patch patch 03 ("iomap: fix incorrect did_zero setting
>    in iomap_zero_iter()").
> Changes since v2:
>  - Collect RVB tags from Darrick and Joanne.
>  - Remove CC stable tag in patch 01 as Joanne suggested.
> Changes since v1:
>  - Add fix tags to patch 01 and 04.
>  - In patch 04, change ifs_set_range_uptodate() to always fall through
>    to ifs_is_fully_uptodate(), preventing a false-positive uptodate
>    mask.
>  - Add patch 05, add comments for ifs_clear/set_range_dirty().
> 
> v3: https://lore.kernel.org/linux-fsdevel/20260713072906.1726059-1-yi.zhang@huaweicloud.com/
> v2: https://lore.kernel.org/linux-fsdevel/20260520030357.679687-1-yi.zhang@huaweicloud.com/
> v1: https://lore.kernel.org/linux-fsdevel/20260514062955.1183976-1-yi.zhang@huaweicloud.com/
> 
> 
> Original Cover-letter:
> 
> This patch series contains a few trivial iomap-related fixes in
> preparation for converting ext4 buffered I/O to use iomap. 
> 
> The first three patches are taken from my ext4 conversion series [1], as
> suggested by Christoph. The fourth patch fixes a bug originally reported
> by Sashiko during review of my series; although unrelated to the ext4
> conversion, it is worth fixing on its own. Please see the following
> patches for detail. The fifth patch add comments for
> ifs_clear/set_range_dirty(), and the last patch avoids merging ioends
> that have different private data.
> 
> Thanks,
> Yi.
> 
> [1] https://lore.kernel.org/linux-ext4/20260511072344.191271-1-yi.zhang@huaweicloud.com/
> 
> Zhang Yi (5):
>   iomap: correct the range of a partial dirty clear
>   iomap: support invalidating partial folios
>   iomap: fix incorrect did_zero setting in iomap_zero_iter()
>   iomap: fix out-of-bounds bitmap_set() with zero-length range
>   iomap: add comments for ifs_clear/set_range_dirty()
> 
>  fs/iomap/buffered-io.c | 58 ++++++++++++++++++++++++++++++++----------
>  1 file changed, 44 insertions(+), 14 deletions(-)
> 
> -- 
> 2.52.0
> 
>