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