Hi Zhang, After merging the thermal tree, today's linux-next build (x86_64 allmodconfig) failed like this: drivers/thermal/cpu_cooling.c: In function 'get_idr': drivers/thermal/cpu_cooling.c:89:14: error: 'MAX_ID_MASK' undeclared (first use in this function) Caused by commit 023614183768 ("thermal: add generic cpufreq cooling implementation") interacting with commit 125c4c706b68 ("idr: rename MAX_LEVEL to MAX_IDR_LEVEL") which very recently entered Linus' tree. I have applied the following fix patch for today: From: Stephen Rothwell Date: Mon, 8 Oct 2012 10:56:56 +1100 Subject: [PATCH] thermal: fix for for MAX_ID_MASK to MAX_IDR_MASK rename Signed-off-by: Stephen Rothwell --- drivers/thermal/cpu_cooling.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c index 9050c1b..cc1c930 100644 --- a/drivers/thermal/cpu_cooling.c +++ b/drivers/thermal/cpu_cooling.c @@ -86,7 +86,7 @@ again: else if (unlikely(err)) return err; - *id = *id & MAX_ID_MASK; + *id = *id & MAX_IDR_MASK; return 0; } -- 1.7.10.280.gaa39 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au