Re: linux-next: build failure after merge of the fs-next tree

[Lorenzo Stoakes (Oracle)]

On Fri, Mar 27, 2026 at 07:22:12PM +0000, Mark Brown wrote:
> Hi all,
>
> After merging the fs-next tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>
> /tmp/next/build/fs/exfat/file.c: In function 'exfat_file_mmap_prepare':
> /tmp/next/build/fs/exfat/file.c:842:13: error: implicit
> declaration of function 'vma_desc_test_flags'; did you mean
> 'vma_desc_set_flags'? [-Wimplicit-function-declaration]
>   842 |         if (vma_desc_test_flags(desc, VMA_WRITE_BIT)) {
>       |             ^~~~~~~~~~~~~~~~~~~ vma_desc_set_flags
>
> Caused by commit
>
>   9b373eacd6e6c4 (exfat: add iomap buffered I/O support)
>
> from the exfat tree interacting with
>
>   2c3b5ea7028fa (mm: reintroduce vma_desc_test() as a singular flag test)
>
> from one of the mm trees.  I have applied a fixup which I can carry as
> needed.
>
> From c4935dbc4b15a9119616ac73b17eff29a7e2ec87 Mon Sep 17 00:00:00 2001
> From: Mark Brown <broonie@xxxxxxxxxx>
> Date: Fri, 27 Mar 2026 19:08:13 +0000
> Subject: [PATCH] exfat: Fix up merge with mm
>
> /tmp/next/build/fs/exfat/file.c: In function 'exfat_file_mmap_prepare':
> /tmp/next/build/fs/exfat/file.c:842:13: error: implicit
> declaration of function 'vma_desc_test_flags'; did you mean
> 'vma_desc_set_flags'? [-Wimplicit-function-declaration]
>   842 |         if (vma_desc_test_flags(desc, VMA_WRITE_BIT)) {
>       |             ^~~~~~~~~~~~~~~~~~~ vma_desc_set_flags
>
> Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
> ---
>  fs/exfat/file.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/exfat/file.c b/fs/exfat/file.c
> index 9a30c32b3a0526..82db5ebaaad7b7 100644
> --- a/fs/exfat/file.c
> +++ b/fs/exfat/file.c
> @@ -839,7 +839,7 @@ static int exfat_file_mmap_prepare(struct vm_area_desc *desc)
>  	if (unlikely(exfat_forced_shutdown(file_inode(desc->file)->i_sb)))
>  		return -EIO;
>
> -	if (vma_desc_test_flags(desc, VMA_WRITE_BIT)) {
> +	if (vma_desc_test(desc, VMA_WRITE_BIT)) {

LGTM, Cheers!

>  		struct inode *inode = file_inode(file);
>  		loff_t from, to;
>  		int err;
> --
> 2.47.3
>