[Cluster-devel] Fix typo in gfs_page_mkwrite()

[Benjamin Marzinski <bmarzins@redhat.com>]

There is a typo in gfs2_page_mkwrite()

gfs2_write_alloc_required() expects pos to be the offset in bytes. However,
instead of the page index being shifted by by PAGE_CACHE_SHIFT, it was shifted
by (PAGE_CACHE_SIZE - inode->i_blkbits).  This patch simply shifts the page
index by the proper amount.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
 fs/gfs2/ops_file.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: kernel-315191/fs/gfs2/ops_file.c
===================================================================
--- kernel-315191.orig/fs/gfs2/ops_file.c
+++ kernel-315191/fs/gfs2/ops_file.c
@@ -342,7 +342,7 @@ static int gfs2_page_mkwrite(struct vm_a
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	unsigned long last_index;
-	u64 pos = page->index << (PAGE_CACHE_SIZE - inode->i_blkbits);
+	u64 pos = page->index << PAGE_CACHE_SHIFT;
 	unsigned int data_blocks, ind_blocks, rblocks;
 	int alloc_required = 0;
 	struct gfs2_holder gh;