The 'end_byte' parameter of filemap_range_has_page is required to be
inclusive, so follow the rule.
Signed-off-by: zhengbin <zhengbin13@xxxxxxxxxx>
---
mm/filemap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 9f5e323..a236bf3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3081,7 +3081,7 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from)
if (iocb->ki_flags & IOCB_NOWAIT) {
/* If there are pages to writeback, return */
if (filemap_range_has_page(inode->i_mapping, pos,
- pos + write_len))
+ pos + write_len - 1))
return -EAGAIN;
} else {
written = filemap_write_and_wait_range(mapping, pos,
--
2.7.4
