[JFFS2] Remove flash offset argument from various functions.

We don't need the upper layers to deal with the physical offset. It's
_always_ c->nextblock->offset + c->sector_size - c->nextblock->free_size
so we might as well just let the actual write functions deal with that.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index 087c2e4..c7e3040 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -265,12 +265,14 @@
 
 
 	/* ... and get an allocation of space from a shiny new block instead */
-	ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len, JFFS2_SUMMARY_NOSUM_SIZE);
+	ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE);
 	if (ret) {
 		printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n");
 		kfree(buf);
 		return;
 	}
+	ofs = write_ofs(c);
+
 	if (end-start >= c->wbuf_pagesize) {
 		/* Need to do another write immediately, but it's possible
 		   that this is just because the wbuf itself is completely