Hi all, After merging the akpm-current tree, today's linux-next build (arm multi_v7_defconfig) failed like this: In file included from include/linux/rcupdate.h:28, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from arch/arm/kernel/asm-offsets.c:11: include/linux/bottom_half.h: In function 'local_bh_disable': include/linux/bottom_half.h:19:24: error: '_THIS_IP_' undeclared (first use in this function) 19 | __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); | ^~~~~~~~~ include/linux/bottom_half.h:19:24: note: each undeclared identifier is reported only once for each function it appears in include/linux/bottom_half.h: In function 'local_bh_enable': include/linux/bottom_half.h:32:23: error: '_THIS_IP_' undeclared (first use in this function) 32 | __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); | ^~~~~~~~~ Presumably caused by a commit in the series that starts with dcaf7a5f413b ("kernel.h: drop unneeded inclusion from other headers") I have applied the following patch for today (though there may be a better solution). From: Stephen Rothwell Date: Fri, 15 Oct 2021 19:58:46 +1100 Subject: [PATCH] bottom_half.h needs kernel.h for _THIS_IP_ on arm at least Signed-off-by: Stephen Rothwell --- include/linux/bottom_half.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h index eed86eb0a1de..11d107d88d03 100644 --- a/include/linux/bottom_half.h +++ b/include/linux/bottom_half.h @@ -2,6 +2,7 @@ #ifndef _LINUX_BH_H #define _LINUX_BH_H +#include #include #if defined(CONFIG_PREEMPT_RT) || defined(CONFIG_TRACE_IRQFLAGS) -- 2.33.0 -- Cheers, Stephen Rothwell