* Re: [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs.
2025-09-29 9:55 [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs Julian Sun via Linux-f2fs-devel
@ 2025-09-29 10:15 ` Qu Wenruo via Linux-f2fs-devel
2025-09-29 10:57 ` Julian Sun
2025-09-29 10:18 ` Jan Kara
2025-09-30 1:47 ` kernel test robot
2 siblings, 1 reply; 5+ messages in thread
From: Qu Wenruo via Linux-f2fs-devel @ 2025-09-29 10:15 UTC (permalink / raw)
To: Julian Sun, linux-fsdevel, linux-f2fs-devel, linux-ext4,
ceph-devel, linux-btrfs
Cc: brauner, tytso, agruenba, jack, willy, clm, adilger.kernel,
dsterba, jaegeuk, idryomov, xiubli
在 2025/9/29 19:25, Julian Sun 写道:
> The logic in wbc_to_tag() is widely used in file systems, so modify this
> function to be extern and use it in file systems.
>
> This patch has only passed compilation tests, but it should be fine.
>
> Signed-off-by: Julian Sun <sunjunchao@bytedance.com>
> ---
> fs/btrfs/extent_io.c | 5 +----
> fs/ceph/addr.c | 6 +-----
> fs/ext4/inode.c | 5 +----
> fs/f2fs/data.c | 5 +----
> fs/gfs2/aops.c | 5 +----
> include/linux/writeback.h | 1 +
> mm/page-writeback.c | 2 +-
> 7 files changed, 7 insertions(+), 22 deletions(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index b21cb72835cc..0fea58287175 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -2390,10 +2390,7 @@ static int extent_write_cache_pages(struct address_space *mapping,
> &BTRFS_I(inode)->runtime_flags))
> wbc->tagged_writepages = 1;
>
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
> retry:
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> tag_pages_for_writeback(mapping, index, end);
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 322ed268f14a..63b75d214210 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -1045,11 +1045,7 @@ void ceph_init_writeback_ctl(struct address_space *mapping,
> ceph_wbc->index = ceph_wbc->start_index;
> ceph_wbc->end = -1;
>
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) {
> - ceph_wbc->tag = PAGECACHE_TAG_TOWRITE;
> - } else {
> - ceph_wbc->tag = PAGECACHE_TAG_DIRTY;
> - }
> + ceph_wbc->tag = wbc_to_tag(wbc);
>
> ceph_wbc->op_idx = -1;
> ceph_wbc->num_ops = 0;
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 5b7a15db4953..196eba7fa39c 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -2619,10 +2619,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
> handle_t *handle = NULL;
> int bpp = ext4_journal_blocks_per_folio(mpd->inode);
>
> - if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(mpd->wbc);
>
> mpd->map.m_len = 0;
> mpd->next_pos = mpd->start_pos;
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 7961e0ddfca3..101e962845db 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -3003,10 +3003,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
> if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
> range_whole = 1;
> }
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
> retry:
> retry = 0;
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
> index 47d74afd63ac..12394fc5dd29 100644
> --- a/fs/gfs2/aops.c
> +++ b/fs/gfs2/aops.c
> @@ -311,10 +311,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
> range_whole = 1;
> cycled = 1; /* ignore range_cyclic tests */
> }
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
>
> retry:
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> diff --git a/include/linux/writeback.h b/include/linux/writeback.h
> index a2848d731a46..884811596e10 100644
> --- a/include/linux/writeback.h
> +++ b/include/linux/writeback.h
> @@ -370,6 +370,7 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
> void writeback_set_ratelimit(void);
> void tag_pages_for_writeback(struct address_space *mapping,
> pgoff_t start, pgoff_t end);
> +xa_mark_t wbc_to_tag(struct writeback_control *wbc);
>
> bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio);
> bool folio_redirty_for_writepage(struct writeback_control *, struct folio *);
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index 3e248d1c3969..243808e19445 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -2434,7 +2434,7 @@ static bool folio_prepare_writeback(struct address_space *mapping,
> return true;
> }
>
> -static xa_mark_t wbc_to_tag(struct writeback_control *wbc)
> +xa_mark_t wbc_to_tag(struct writeback_control *wbc)
The function is small enough, why not export it as an inline function?
The current version also lacks EXPORT_SYMBOL(), it may cause problems
for fses built as a module.
Thanks,
Qu
> {
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> return PAGECACHE_TAG_TOWRITE;
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Linux-f2fs-devel@lists.sourceforge.net
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs.
2025-09-29 10:15 ` Qu Wenruo via Linux-f2fs-devel
@ 2025-09-29 10:57 ` Julian Sun
0 siblings, 0 replies; 5+ messages in thread
From: Julian Sun @ 2025-09-29 10:57 UTC (permalink / raw)
To: Qu Wenruo
Cc: brauner, xiubli, tytso, agruenba, Julian Sun, jack, willy,
linux-f2fs-devel, clm, dsterba, jaegeuk, linux-fsdevel,
adilger.kernel, ceph-devel, linux-ext4, idryomov, linux-btrfs
On Mon, Sep 29, 2025 at 6:16 PM Qu Wenruo <wqu@suse.com> wrote:
>
>
>
> 在 2025/9/29 19:25, Julian Sun 写道:
> > The logic in wbc_to_tag() is widely used in file systems, so modify this
> > function to be extern and use it in file systems.
> >
> > This patch has only passed compilation tests, but it should be fine.
> >
> > Signed-off-by: Julian Sun <sunjunchao@bytedance.com>
> > ---
> > fs/btrfs/extent_io.c | 5 +----
> > fs/ceph/addr.c | 6 +-----
> > fs/ext4/inode.c | 5 +----
> > fs/f2fs/data.c | 5 +----
> > fs/gfs2/aops.c | 5 +----
> > include/linux/writeback.h | 1 +
> > mm/page-writeback.c | 2 +-
> > 7 files changed, 7 insertions(+), 22 deletions(-)
> >
> > diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> > index b21cb72835cc..0fea58287175 100644
> > --- a/fs/btrfs/extent_io.c
> > +++ b/fs/btrfs/extent_io.c
> > @@ -2390,10 +2390,7 @@ static int extent_write_cache_pages(struct address_space *mapping,
> > &BTRFS_I(inode)->runtime_flags))
> > wbc->tagged_writepages = 1;
> >
> > - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > - tag = PAGECACHE_TAG_TOWRITE;
> > - else
> > - tag = PAGECACHE_TAG_DIRTY;
> > + tag = wbc_to_tag(wbc);
> > retry:
> > if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > tag_pages_for_writeback(mapping, index, end);
> > diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> > index 322ed268f14a..63b75d214210 100644
> > --- a/fs/ceph/addr.c
> > +++ b/fs/ceph/addr.c
> > @@ -1045,11 +1045,7 @@ void ceph_init_writeback_ctl(struct address_space *mapping,
> > ceph_wbc->index = ceph_wbc->start_index;
> > ceph_wbc->end = -1;
> >
> > - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) {
> > - ceph_wbc->tag = PAGECACHE_TAG_TOWRITE;
> > - } else {
> > - ceph_wbc->tag = PAGECACHE_TAG_DIRTY;
> > - }
> > + ceph_wbc->tag = wbc_to_tag(wbc);
> >
> > ceph_wbc->op_idx = -1;
> > ceph_wbc->num_ops = 0;
> > diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> > index 5b7a15db4953..196eba7fa39c 100644
> > --- a/fs/ext4/inode.c
> > +++ b/fs/ext4/inode.c
> > @@ -2619,10 +2619,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
> > handle_t *handle = NULL;
> > int bpp = ext4_journal_blocks_per_folio(mpd->inode);
> >
> > - if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)
> > - tag = PAGECACHE_TAG_TOWRITE;
> > - else
> > - tag = PAGECACHE_TAG_DIRTY;
> > + tag = wbc_to_tag(mpd->wbc);
> >
> > mpd->map.m_len = 0;
> > mpd->next_pos = mpd->start_pos;
> > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > index 7961e0ddfca3..101e962845db 100644
> > --- a/fs/f2fs/data.c
> > +++ b/fs/f2fs/data.c
> > @@ -3003,10 +3003,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
> > if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
> > range_whole = 1;
> > }
> > - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > - tag = PAGECACHE_TAG_TOWRITE;
> > - else
> > - tag = PAGECACHE_TAG_DIRTY;
> > + tag = wbc_to_tag(wbc);
> > retry:
> > retry = 0;
> > if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
> > index 47d74afd63ac..12394fc5dd29 100644
> > --- a/fs/gfs2/aops.c
> > +++ b/fs/gfs2/aops.c
> > @@ -311,10 +311,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
> > range_whole = 1;
> > cycled = 1; /* ignore range_cyclic tests */
> > }
> > - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > - tag = PAGECACHE_TAG_TOWRITE;
> > - else
> > - tag = PAGECACHE_TAG_DIRTY;
> > + tag = wbc_to_tag(wbc);
> >
> > retry:
> > if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > diff --git a/include/linux/writeback.h b/include/linux/writeback.h
> > index a2848d731a46..884811596e10 100644
> > --- a/include/linux/writeback.h
> > +++ b/include/linux/writeback.h
> > @@ -370,6 +370,7 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
> > void writeback_set_ratelimit(void);
> > void tag_pages_for_writeback(struct address_space *mapping,
> > pgoff_t start, pgoff_t end);
> > +xa_mark_t wbc_to_tag(struct writeback_control *wbc);
> >
> > bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio);
> > bool folio_redirty_for_writepage(struct writeback_control *, struct folio *);
> > diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> > index 3e248d1c3969..243808e19445 100644
> > --- a/mm/page-writeback.c
> > +++ b/mm/page-writeback.c
> > @@ -2434,7 +2434,7 @@ static bool folio_prepare_writeback(struct address_space *mapping,
> > return true;
> > }
> >
> > -static xa_mark_t wbc_to_tag(struct writeback_control *wbc)
> > +xa_mark_t wbc_to_tag(struct writeback_control *wbc)
>
> The function is small enough, why not export it as an inline function?
>
Good idea, will fix it in patch v2.
> The current version also lacks EXPORT_SYMBOL(), it may cause problems
> for fses built as a module.
>
> Thanks,
> Qu
>
> > {
> > if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> > return PAGECACHE_TAG_TOWRITE;
>
>
Thanks,
--
Julian Sun <sunjunchao2870@gmail.com>
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs.
2025-09-29 9:55 [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs Julian Sun via Linux-f2fs-devel
2025-09-29 10:15 ` Qu Wenruo via Linux-f2fs-devel
@ 2025-09-29 10:18 ` Jan Kara
2025-09-30 1:47 ` kernel test robot
2 siblings, 0 replies; 5+ messages in thread
From: Jan Kara @ 2025-09-29 10:18 UTC (permalink / raw)
To: Julian Sun
Cc: brauner, xiubli, tytso, agruenba, jack, willy, linux-f2fs-devel,
clm, dsterba, jaegeuk, linux-fsdevel, adilger.kernel, ceph-devel,
linux-ext4, idryomov, linux-btrfs
On Mon 29-09-25 17:55:44, Julian Sun wrote:
> The logic in wbc_to_tag() is widely used in file systems, so modify this
> function to be extern and use it in file systems.
>
> This patch has only passed compilation tests, but it should be fine.
>
> Signed-off-by: Julian Sun <sunjunchao@bytedance.com>
Yeah, good idea. Feel free to add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> fs/btrfs/extent_io.c | 5 +----
> fs/ceph/addr.c | 6 +-----
> fs/ext4/inode.c | 5 +----
> fs/f2fs/data.c | 5 +----
> fs/gfs2/aops.c | 5 +----
> include/linux/writeback.h | 1 +
> mm/page-writeback.c | 2 +-
> 7 files changed, 7 insertions(+), 22 deletions(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index b21cb72835cc..0fea58287175 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -2390,10 +2390,7 @@ static int extent_write_cache_pages(struct address_space *mapping,
> &BTRFS_I(inode)->runtime_flags))
> wbc->tagged_writepages = 1;
>
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
> retry:
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> tag_pages_for_writeback(mapping, index, end);
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 322ed268f14a..63b75d214210 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -1045,11 +1045,7 @@ void ceph_init_writeback_ctl(struct address_space *mapping,
> ceph_wbc->index = ceph_wbc->start_index;
> ceph_wbc->end = -1;
>
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) {
> - ceph_wbc->tag = PAGECACHE_TAG_TOWRITE;
> - } else {
> - ceph_wbc->tag = PAGECACHE_TAG_DIRTY;
> - }
> + ceph_wbc->tag = wbc_to_tag(wbc);
>
> ceph_wbc->op_idx = -1;
> ceph_wbc->num_ops = 0;
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 5b7a15db4953..196eba7fa39c 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -2619,10 +2619,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
> handle_t *handle = NULL;
> int bpp = ext4_journal_blocks_per_folio(mpd->inode);
>
> - if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(mpd->wbc);
>
> mpd->map.m_len = 0;
> mpd->next_pos = mpd->start_pos;
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 7961e0ddfca3..101e962845db 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -3003,10 +3003,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
> if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
> range_whole = 1;
> }
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
> retry:
> retry = 0;
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
> index 47d74afd63ac..12394fc5dd29 100644
> --- a/fs/gfs2/aops.c
> +++ b/fs/gfs2/aops.c
> @@ -311,10 +311,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
> range_whole = 1;
> cycled = 1; /* ignore range_cyclic tests */
> }
> - if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> - tag = PAGECACHE_TAG_TOWRITE;
> - else
> - tag = PAGECACHE_TAG_DIRTY;
> + tag = wbc_to_tag(wbc);
>
> retry:
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> diff --git a/include/linux/writeback.h b/include/linux/writeback.h
> index a2848d731a46..884811596e10 100644
> --- a/include/linux/writeback.h
> +++ b/include/linux/writeback.h
> @@ -370,6 +370,7 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
> void writeback_set_ratelimit(void);
> void tag_pages_for_writeback(struct address_space *mapping,
> pgoff_t start, pgoff_t end);
> +xa_mark_t wbc_to_tag(struct writeback_control *wbc);
>
> bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio);
> bool folio_redirty_for_writepage(struct writeback_control *, struct folio *);
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index 3e248d1c3969..243808e19445 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -2434,7 +2434,7 @@ static bool folio_prepare_writeback(struct address_space *mapping,
> return true;
> }
>
> -static xa_mark_t wbc_to_tag(struct writeback_control *wbc)
> +xa_mark_t wbc_to_tag(struct writeback_control *wbc)
> {
> if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
> return PAGECACHE_TAG_TOWRITE;
> --
> 2.39.5
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs.
2025-09-29 9:55 [f2fs-dev] [PATCH] fs: Make wbc_to_tag() extern and use it in fs Julian Sun via Linux-f2fs-devel
2025-09-29 10:15 ` Qu Wenruo via Linux-f2fs-devel
2025-09-29 10:18 ` Jan Kara
@ 2025-09-30 1:47 ` kernel test robot
2 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2025-09-30 1:47 UTC (permalink / raw)
To: Julian Sun, linux-fsdevel, linux-f2fs-devel, linux-ext4,
ceph-devel, linux-btrfs
Cc: brauner, tytso, agruenba, jack, willy, clm, adilger.kernel,
oe-kbuild-all, dsterba, jaegeuk, idryomov, xiubli
Hi Julian,
kernel test robot noticed the following build errors:
[auto build test ERROR on kdave/for-next]
[also build test ERROR on ceph-client/testing ceph-client/for-linus tytso-ext4/dev jaegeuk-f2fs/dev-test jaegeuk-f2fs/dev gfs2/for-next akpm-mm/mm-everything linus/master v6.17 next-20250929]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Julian-Sun/fs-Make-wbc_to_tag-extern-and-use-it-in-fs/20250929-175656
base: https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
patch link: https://lore.kernel.org/r/20250929095544.308392-1-sunjunchao%40bytedance.com
patch subject: [PATCH] fs: Make wbc_to_tag() extern and use it in fs.
config: s390-randconfig-001-20250930 (https://download.01.org/0day-ci/archive/20250930/202509300954.4OaImb0r-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250930/202509300954.4OaImb0r-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509300954.4OaImb0r-lkp@intel.com/
All errors (new ones prefixed by >>, old ones prefixed by <<):
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/base/regmap/regmap-mmio.o
>> ERROR: modpost: "wbc_to_tag" [fs/btrfs/btrfs.ko] undefined!
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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