generic_perform_write() can't handle a THP, so we have to return the
subpage of that THP from afs_write_begin() and then convert it back into
the head on entry to afs_write_end().
Signed-off-by: David Howells <dhowe...@redhat.com>
cc: Marc Dionne <marc.dio...@auristor.com>
cc: Matthew Wilcox <wi...@infradead.org>
cc: linux-...@lists.infradead.org
---
fs/afs/write.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 19be3153d610..a01b1687a146 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -78,7 +78,7 @@ int afs_write_begin(struct file *file, struct address_space
*mapping,
goto flush_conflicting_write;
}
- *_page = page;
+ *_page = find_subpage(page, pos / PAGE_SIZE);
_leave(" = 0");
return 0;
@@ -108,9 +108,10 @@ int afs_write_begin(struct file *file, struct
address_space *mapping,
*/
int afs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata)
+ struct page *subpage, void *fsdata)
{
struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
+ struct page *page = thp_head(subpage);
unsigned long priv;
unsigned int f, from = offset_in_thp(page, pos);
unsigned int t, to = from + copied;
--
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