Re: [PATCH 2/3] fs: Export generic_fadvise()

["Darrick J. Wong" <darrick.wong@oracle.com>]

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@vger.kernel.org # Needed by "xfs: Fix stale data exposure when
> 					readahead races with hole punch"
> Signed-off-by: Jan Kara <jack@suse.cz>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--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
>