On Mon, Jul 15, 2013 at 01:47:47PM +0300, Kirill A. Shutemov wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
>
> There's only one caller of do_generic_file_read() and the only actor is
> file_read_actor(). No reason to have a callback parameter.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Would it make sense to do the same thing to do_shmem_file_read()?
From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
There's only one caller of do_shmem_file_read() and the only actor is
file_read_actor(). No reason to have a callback parameter.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
diff --git a/mm/shmem.c b/mm/shmem.c
index 5e6a842..6a9c325 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1464,7 +1464,7 @@ shmem_write_end(struct file *file, struct address_space *mapping,
return copied;
}
-static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_t *desc, read_actor_t actor)
+static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_t *desc)
{
struct inode *inode = file_inode(filp);
struct address_space *mapping = inode->i_mapping;
@@ -1546,13 +1546,14 @@ static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_
* Ok, we have the page, and it's up-to-date, so
* now we can copy it to user space...
*
- * The actor routine returns how many bytes were actually used..
+ * The file_read_actor routine returns how many bytes were actually
+ * used..
* NOTE! This may not be the same as how much of a user buffer
* we filled up (we may be padding etc), so we can only update
- * "pos" here (the actor routine has to update the user buffer
+ * "pos" here (file_read_actor has to update the user buffer
* pointers and the remaining count).
*/
- ret = actor(desc, page, offset, nr);
+ ret = file_read_actor(desc, page, offset, nr);
offset += ret;
index += offset >> PAGE_CACHE_SHIFT;
offset &= ~PAGE_CACHE_MASK;
@@ -1590,7 +1591,7 @@ static ssize_t shmem_file_aio_read(struct kiocb *iocb,
if (desc.count == 0)
continue;
desc.error = 0;
- do_shmem_file_read(filp, ppos, &desc, file_read_actor);
+ do_shmem_file_read(filp, ppos, &desc);
retval += desc.written;
if (desc.error) {
retval = retval ?: desc.error;
--
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