Fix page allocation flags in grow_dev_page()

grow_dev_page() simply passes GFP_NOFS to find_or_create_page.  This means
the allocation of radix tree nodes is done with GFP_NOFS and the allocation
of a new page is done using GFP_NOFS.

The mapping has a flags field that contains the necessary allocation flags
for the page cache allocation.  These need to be consulted in order to get
DMA and HIGHMEM allocations etc right.  And yes a blockdev could be
allowing Highmem allocations if its a ramdisk.

Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/buffer.c b/fs/buffer.c
index 3deeb886f6e6f76ffe18a1893eed724f5e588639..49590d590d7dbeaa857a89221f26c274956af6fd 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -981,7 +981,8 @@ grow_dev_page(struct block_device *bdev, sector_t block,
        struct page *page;
        struct buffer_head *bh;
 
-       page = find_or_create_page(inode->i_mapping, index, GFP_NOFS);
+       page = find_or_create_page(inode->i_mapping, index,
+               mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
        if (!page)
                return NULL;