buffer: Convert __bh_read to bh_submit()

Avoid an extra indirect function call and changing the buffer refcount
by using bh_submit() instead of submit_bh().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20260528173150.1093780-9-willy@infradead.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

diff --git a/fs/buffer.c b/fs/buffer.c
index deabf74793250627e50ca4bfb4a0a1645529d0dd..97c8b99660605fa4c4b6e31d8b4fc20d1b7ace2d 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3089,9 +3089,7 @@ int __bh_read(struct buffer_head *bh, blk_opf_t op_flags, bool wait)
 
        BUG_ON(!buffer_locked(bh));
 
-       get_bh(bh);
-       bh->b_end_io = end_buffer_read_sync;
-       submit_bh(REQ_OP_READ | op_flags, bh);
+       bh_submit(bh, REQ_OP_READ | op_flags, bh_end_read);
        if (wait) {
                wait_on_buffer(bh);
                if (!buffer_uptodate(bh))