iocb->ki_pos has been updated with the number of written bytes since
generic_perform_write().
Besides __filemap_fdatawrite_range() accepts the inclusive end of the
data range.
Fixes: 1d4457576570 ("mm: call filemap_fdatawrite_range_kick() after IOCB_DONTCACHE issue")
Signed-off-by: Jingbo Xu <jefflexu@xxxxxxxxxxxxxxxxx>
---
include/linux/fs.h | 4 ++--
mm/filemap.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2c3b2f8a621f..f12774291423 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2975,8 +2975,8 @@ static inline ssize_t generic_write_sync(struct kiocb *iocb, ssize_t count)
} else if (iocb->ki_flags & IOCB_DONTCACHE) {
struct address_space *mapping = iocb->ki_filp->f_mapping;
- filemap_fdatawrite_range_kick(mapping, iocb->ki_pos,
- iocb->ki_pos + count);
+ filemap_fdatawrite_range_kick(mapping, iocb->ki_pos - count,
+ iocb->ki_pos - 1);
}
return count;
diff --git a/mm/filemap.c b/mm/filemap.c
index 804d7365680c..d4564a79eb35 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -445,7 +445,7 @@ EXPORT_SYMBOL(filemap_fdatawrite_range);
* filemap_fdatawrite_range_kick - start writeback on a range
* @mapping: target address_space
* @start: index to start writeback on
- * @end: last (non-inclusive) index for writeback
+ * @end: last (inclusive) index for writeback
*
* This is a non-integrity writeback helper, to start writing back folios
* for the indicated range.
--
2.19.1.6.gb485710b
