[GFS2] Fix a bug on i386 due to evaluation order

Since gcc didn't evaluate the last two terms of the expression in
glock.c:1881 as a constant expression, it resulted in an error on
i386 due to the lack of a 64bit divide instruction. This adds some
brackets to fix the problem.

This was reported by Andrew Morton.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>

fs/gfs2/glock.c

@@ -1880,7 +1880,7 @@ static int dump_glock(struct glock_iter *gi, struct gfs2_glock *gl)
 	if (test_bit(GLF_DEMOTE, &gl->gl_flags)) {
 		print_dbg(gi, "  Demotion req to state %u (%llu uS ago)\n",
 			  gl->gl_demote_state,
-			  (u64)(jiffies - gl->gl_demote_time)*1000000/HZ);
+			  (u64)(jiffies - gl->gl_demote_time)*(1000000/HZ));
 	}
 	if (gl->gl_ops == &gfs2_inode_glops && gl->gl_object) {
 		if (!test_bit(GLF_LOCK, &gl->gl_flags) &&