mm: make snapshotting pages for stable writes a per-bio operation

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index b4dcb34c9635ae61b747bb9d4816477a49a8d90a..71578d69b82dbc6b2d84b53a8bcfc757db234a16 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2949,7 +2949,7 @@ static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh)
        }
 }
 
-int submit_bh(int rw, struct buffer_head * bh)
+int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags)
 {
        struct bio *bio;
        int ret = 0;
@@ -2984,6 +2984,7 @@ int submit_bh(int rw, struct buffer_head * bh)
 
        bio->bi_end_io = end_bio_bh_io_sync;
        bio->bi_private = bh;
+       bio->bi_flags |= bio_flags;
 
        /* Take care of bh's that straddle the end of the device */
        guard_bh_eod(rw, bio, bh);
@@ -2997,6 +2998,12 @@ int submit_bh(int rw, struct buffer_head * bh)
        bio_put(bio);
        return ret;
 }
+EXPORT_SYMBOL_GPL(_submit_bh);
+
+int submit_bh(int rw, struct buffer_head *bh)
+{
+       return _submit_bh(rw, bh, 0);
+}
 EXPORT_SYMBOL(submit_bh);
 
 /**