On Thu, Jul 11, 2019 at 04:00:11PM +0200, Jan Kara wrote:
> Filesystems will need to call this function from their fadvise handlers.
>
> CC: stable@xxxxxxxxxxxxxxx # Needed by "xfs: Fix stale data exposure when
> readahead races with hole punch"
> Signed-off-by: Jan Kara <jack@xxxxxxx>
Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
--D
> ---
> include/linux/fs.h | 2 ++
> mm/fadvise.c | 4 ++--
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index f7fdfe93e25d..2666862ff00d 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -3536,6 +3536,8 @@ extern void inode_nohighmem(struct inode *inode);
> /* mm/fadvise.c */
> extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len,
> int advice);
> +extern int generic_fadvise(struct file *file, loff_t offset, loff_t len,
> + int advice);
>
> #if defined(CONFIG_IO_URING)
> extern struct sock *io_uring_get_socket(struct file *file);
> diff --git a/mm/fadvise.c b/mm/fadvise.c
> index 467bcd032037..4f17c83db575 100644
> --- a/mm/fadvise.c
> +++ b/mm/fadvise.c
> @@ -27,8 +27,7 @@
> * deactivate the pages and clear PG_Referenced.
> */
>
> -static int generic_fadvise(struct file *file, loff_t offset, loff_t len,
> - int advice)
> +int generic_fadvise(struct file *file, loff_t offset, loff_t len, int advice)
> {
> struct inode *inode;
> struct address_space *mapping;
> @@ -178,6 +177,7 @@ static int generic_fadvise(struct file *file, loff_t offset, loff_t len,
> }
> return 0;
> }
> +EXPORT_SYMBOL(generic_fadvise);
>
> int vfs_fadvise(struct file *file, loff_t offset, loff_t len, int advice)
> {
> --
> 2.16.4
>
