[PATCH 20/60] f2fs: f2fs_read_end_io: comment on direct access to bvec table

[Ming Lei]

Signed-off-by: Ming Lei <tom.leim...@gmail.com>
---
 fs/f2fs/data.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9ae194fd2fdb..24f6f6977d37 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -35,6 +35,10 @@ static void f2fs_read_end_io(struct bio *bio)
        int i;
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
+       /*
+        * It is still safe to retrieve the 1st page of the bio
+        * in this way after supporting multipage bvec.
+        */
        if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO))
                bio->bi_error = -EIO;
 #endif
-- 
2.7.4