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SubjectRe: linux-next: build failure after merge of the folio tree
Hi Stephen,

On Mon, May 02, 2022 at 06:04:25PM +1000, Stephen Rothwell wrote:
> Hi all,
>
> After merging the folio tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>
> fs/erofs/fscache.c:255:10: error: 'const struct address_space_operations' has no member named 'readpage'
> 255 | .readpage = erofs_fscache_meta_readpage,
> | ^~~~~~~~
> fs/erofs/fscache.c:255:21: error: initialization of 'int (*)(struct page *, struct writeback_control *)' from incompatible pointer type 'int (*)(struct file *, struct page *)' [-Werror=incompatible-pointer-types]
> 255 | .readpage = erofs_fscache_meta_readpage,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
> fs/erofs/fscache.c:255:21: note: (near initialization for 'erofs_fscache_meta_aops.writepage')
> fs/erofs/fscache.c:259:10: error: 'const struct address_space_operations' has no member named 'readpage'
> 259 | .readpage = erofs_fscache_readpage,
> | ^~~~~~~~
> fs/erofs/fscache.c:259:21: error: initialization of 'int (*)(struct page *, struct writeback_control *)' from incompatible pointer type 'int (*)(struct file *, struct page *)' [-Werror=incompatible-pointer-types]
> 259 | .readpage = erofs_fscache_readpage,
> | ^~~~~~~~~~~~~~~~~~~~~~
> fs/erofs/fscache.c:259:21: note: (near initialization for 'erofs_fscache_access_aops.writepage')
>
> Caused by commit
>
> 00da6d4b7219 ("mm,fs: Remove stray references to ->readpage")
>
> interacting with commits
>
> 60aa7e805f00 ("erofs: implement fscache-based metadata read")
> e472f468adbe ("erofs: implement fscache-based data read for non-inline layout")
>
> from the erofs tree.
>
> I have applied the following merge fix patch.
>

That looks good to me, will point out this conflict then.

Thanks,
Gao Xiang

> From: Stephen Rothwell <sfr@canb.auug.org.au>
> Date: Mon, 2 May 2022 17:57:39 +1000
> Subject: [PATCH] fixup for "mm,fs: Remove stray references to ->readpage"
>
> interacting with commits
>
> 60aa7e805f00 ("erofs: implement fscache-based metadata read")
> e472f468adbe ("erofs: implement fscache-based data read for non-inline layout")
>
> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> ---
> fs/erofs/fscache.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
> index a402d8f0a063..1bb2d0fc19c8 100644
> --- a/fs/erofs/fscache.c
> +++ b/fs/erofs/fscache.c
> @@ -59,10 +59,9 @@ static int erofs_fscache_read_folios(struct fscache_cookie *cookie,
> return ret;
> }
>
> -static int erofs_fscache_meta_readpage(struct file *data, struct page *page)
> +static int erofs_fscache_meta_read_folio(struct file *data, struct folio *folio)
> {
> int ret;
> - struct folio *folio = page_folio(page);
> struct super_block *sb = folio_mapping(folio)->host->i_sb;
> struct erofs_map_dev mdev = {
> .m_deviceid = 0,
> @@ -110,9 +109,8 @@ static int erofs_fscache_readpage_inline(struct folio *folio,
> return 0;
> }
>
> -static int erofs_fscache_readpage(struct file *file, struct page *page)
> +static int erofs_fscache_read_folio(struct file *file, struct folio *folio)
> {
> - struct folio *folio = page_folio(page);
> struct inode *inode = folio_mapping(folio)->host;
> struct super_block *sb = inode->i_sb;
> struct erofs_map_blocks map;
> @@ -252,11 +250,11 @@ static void erofs_fscache_readahead(struct readahead_control *rac)
> }
>
> static const struct address_space_operations erofs_fscache_meta_aops = {
> - .readpage = erofs_fscache_meta_readpage,
> + .read_folio = erofs_fscache_meta_read_folio,
> };
>
> const struct address_space_operations erofs_fscache_access_aops = {
> - .readpage = erofs_fscache_readpage,
> + .read_folio = erofs_fscache_read_folio,
> .readahead = erofs_fscache_readahead,
> };
>
> --
> 2.35.1
>
> --
> Cheers,
> Stephen Rothwell


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