arch/mips/include/asm/processor.h references task_stack_page, but it is not defined anywhere. Including linux/sched/task_stack.h directly in asm/processor.h caused a different compile warning. This fixes the folowing compile error in kernel 4.11-rc1: CC arch/mips/kernel/smp-mt.o In file included from ./arch/mips/include/asm/irq.h:16:0, from ./include/linux/irq.h:26, from ./include/asm-generic/hardirq.h:12, from ./arch/mips/include/asm/hardirq.h:16, from ./include/linux/hardirq.h:8, from ./include/linux/interrupt.h:12, from arch/mips/kernel/smp-mt.c:23: arch/mips/kernel/smp-mt.c: In function 'vsmp_boot_secondary': ./arch/mips/include/asm/processor.h:384:41: error: implicit declaration of function 'task_stack_page' [-Werror=implicit-function-declaration] #define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \ ^ ./arch/mips/include/asm/mipsmtregs.h:339:11: note: in definition of macro 'mttgpr' : : "r" (v)); \ ^ arch/mips/kernel/smp-mt.c:215:2: note: in expansion of macro 'write_tc_gpr_sp' write_tc_gpr_sp( __KSTK_TOS(idle)); ^ arch/mips/kernel/smp-mt.c:215:19: note: in expansion of macro '__KSTK_TOS' write_tc_gpr_sp( __KSTK_TOS(idle)); ^ cc1: all warnings being treated as errors scripts/Makefile.build:294: recipe for target 'arch/mips/kernel/smp-mt.o' failed Fixes: f3ac60671954 ("sched/headers: Move task-stack related APIs from <linux/sched.h> to <linux/sched/task_stack.h>") Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx> --- arch/mips/kernel/smp-mt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c index e077ea3e11fb..effc1ed18954 100644 --- a/arch/mips/kernel/smp-mt.c +++ b/arch/mips/kernel/smp-mt.c @@ -18,7 +18,7 @@ * Copyright (C) 2006 Ralf Baechle (ralf@xxxxxxxxxxxxxx) */ #include <linux/kernel.h> -#include <linux/sched.h> +#include <linux/sched/task_stack.h> #include <linux/cpumask.h> #include <linux/interrupt.h> #include <linux/irqchip/mips-gic.h> -- 2.11.0