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>
---
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
