Commit 7ba382e29c4f ("UPSTREAM: drm/i915: Shrink cxsr_latency_table") in chromeos-4.4 rearranged struct cxsr_latency as follows.

 struct cxsr_latency {
-       int is_desktop;
-       int is_ddr3;
-       unsigned long fsb_freq;
-       unsigned long mem_freq;
-       unsigned long display_sr;
-       unsigned long display_hpll_disable;
-       unsigned long cursor_sr;
-       unsigned long cursor_hpll_disable;
+       u16 fsb_freq;
+       u16 mem_freq;
+       u16 display_sr;
+       u16 display_hpll_disable;
+       u16 cursor_sr;
+       u16 cursor_hpll_disable;
+       bool is_desktop : 1;
+       bool is_ddr3 : 1;
 };

However, the commit did not update the actual table, which is still:

static const struct cxsr_latency cxsr_latency_table[] = {
        {1, 0, 800, 400, 3382, 33382, 3983, 33983},    /* DDR2-400 SC */
        {1, 0, 800, 667, 3354, 33354, 3807, 33807},    /* DDR2-667 SC */
        {1, 0, 800, 800, 3347, 33347, 3763, 33763},    /* DDR2-800 SC */
        {1, 1, 800, 667, 6420, 36420, 6873, 36873},    /* DDR3-667 SC */
        {1, 1, 800, 800, 5902, 35902, 6318, 36318},    /* DDR3-800 SC */
...

0day reports:

drivers/gpu/drm/i915/intel_pm.c:228:39: warning: cast truncates bits from constant value (f8f becomes 1) 
drivers/gpu/drm/i915/intel_pm.c:228:45: warning: cast truncates bits from constant value (84bf becomes 1) 
drivers/gpu/drm/i915/intel_pm.c:229:39: warning: cast truncates bits from constant value (edf becomes 1) 
drivers/gpu/drm/i915/intel_pm.c:229:45: warning: cast truncates bits from constant value (840f becomes 1) 
drivers/gpu/drm/i915/intel_pm.c:230:39: warning: cast truncates bits from constant value (eb3 becomes 1) 

and so on, This is not surprising since the boolean variables are now at the end of the structure but still initialized at the beginning.
Also see upstream commit c13fb77890965 ("drm/i915: Fix cxsr_latency_table reorg") which should fix the problem.

I would submit a CL to fix the problem, but it appears that no one complained so maybe I am just confused.