[GFS2] Alter direct I/O path
As per comments received, alter the GFS2 direct I/O path so that
it uses the standard read functions "out of the box". Needs a
small change to one of the VFS functions. This reduces the size
of the code quite a lot and also removes the need for one new export.
Some more work remains to be done, but this is the bones of the
thing.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/mm/filemap.c b/mm/filemap.c
index b9c91ab..a92d690 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1122,7 +1122,6 @@
desc->arg.buf += size;
return size;
}
-EXPORT_SYMBOL_GPL(file_read_actor);
/**
* __generic_file_aio_read - generic filesystem read routine
@@ -1184,7 +1183,8 @@
*ppos = pos + retval;
}
file_accessed(filp);
- goto out;
+ if (retval != 0)
+ goto out;
}
retval = 0;