Merge tag 'xfs-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / fs / xfs / xfs_buf.c
index 32fc5401a7563dcc805c620fcaa413e388daed02..47a318ce82e0ab5828164e6604ffe9dd5f66a0d6 100644 (file)
@@ -1201,7 +1201,8 @@ xfs_buf_ioapply_map(
        int             map,
        int             *buf_offset,
        int             *count,
-       int             rw)
+       int             op,
+       int             op_flags)
 {
        int             page_index;
        int             total_nr_pages = bp->b_page_count;
@@ -1231,16 +1232,14 @@ xfs_buf_ioapply_map(
 
 next_chunk:
        atomic_inc(&bp->b_io_remaining);
-       nr_pages = BIO_MAX_SECTORS >> (PAGE_SHIFT - BBSHIFT);
-       if (nr_pages > total_nr_pages)
-               nr_pages = total_nr_pages;
+       nr_pages = min(total_nr_pages, BIO_MAX_PAGES);
 
        bio = bio_alloc(GFP_NOIO, nr_pages);
        bio->bi_bdev = bp->b_target->bt_bdev;
        bio->bi_iter.bi_sector = sector;
        bio->bi_end_io = xfs_buf_bio_end_io;
        bio->bi_private = bp;
-
+       bio_set_op_attrs(bio, op, op_flags);
 
        for (; size && nr_pages; nr_pages--, page_index++) {
                int     rbytes, nbytes = PAGE_SIZE - offset;
@@ -1264,7 +1263,7 @@ next_chunk:
                        flush_kernel_vmap_range(bp->b_addr,
                                                xfs_buf_vmap_len(bp));
                }
-               submit_bio(rw, bio);
+               submit_bio(bio);
                if (size)
                        goto next_chunk;
        } else {
@@ -1284,7 +1283,8 @@ _xfs_buf_ioapply(
        struct xfs_buf  *bp)
 {
        struct blk_plug plug;
-       int             rw;
+       int             op;
+       int             op_flags = 0;
        int             offset;
        int             size;
        int             i;
@@ -1303,14 +1303,13 @@ _xfs_buf_ioapply(
                bp->b_ioend_wq = bp->b_target->bt_mount->m_buf_workqueue;
 
        if (bp->b_flags & XBF_WRITE) {
+               op = REQ_OP_WRITE;
                if (bp->b_flags & XBF_SYNCIO)
-                       rw = WRITE_SYNC;
-               else
-                       rw = WRITE;
+                       op_flags = WRITE_SYNC;
                if (bp->b_flags & XBF_FUA)
-                       rw |= REQ_FUA;
+                       op_flags |= REQ_FUA;
                if (bp->b_flags & XBF_FLUSH)
-                       rw |= REQ_FLUSH;
+                       op_flags |= REQ_PREFLUSH;
 
                /*
                 * Run the write verifier callback function if it exists. If
@@ -1340,13 +1339,14 @@ _xfs_buf_ioapply(
                        }
                }
        } else if (bp->b_flags & XBF_READ_AHEAD) {
-               rw = READA;
+               op = REQ_OP_READ;
+               op_flags = REQ_RAHEAD;
        } else {
-               rw = READ;
+               op = REQ_OP_READ;
        }
 
        /* we only use the buffer cache for meta-data */
-       rw |= REQ_META;
+       op_flags |= REQ_META;
 
        /*
         * Walk all the vectors issuing IO on them. Set up the initial offset
@@ -1358,7 +1358,7 @@ _xfs_buf_ioapply(
        size = BBTOB(bp->b_io_length);
        blk_start_plug(&plug);
        for (i = 0; i < bp->b_map_count; i++) {
-               xfs_buf_ioapply_map(bp, i, &offset, &size, rw);
+               xfs_buf_ioapply_map(bp, i, &offset, &size, op, op_flags);
                if (bp->b_error)
                        break;
                if (size <= 0)