mn10300: fix build error of missing fpu_save()

[ Upstream commit 3705ccfdd1 ]

When CONFIG_FPU is not enabled on arch/mn10300, <asm/switch_to.h> causes
a build error with a call to fpu_save():

  kernel/built-in.o: In function `.L410':
  core.c:(.sched.text+0x28a): undefined reference to `fpu_save'

Fix this by including <asm/fpu.h> in <asm/switch_to.h> so that an empty
static inline fpu_save() is defined.

Signed-off-by: Randy Dunlap <>
Reported-by: kbuild test robot <>
Reviewed-by: David Howells <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>
Signed-off-by: Sasha Levin <>
Signed-off-by: Greg Kroah-Hartman <>
Randy Dunlap 6 years ago committed by Greg Kroah-Hartman
parent 5e4cafca06
commit 093d494c6d

@ -16,7 +16,7 @@
struct task_struct;
struct thread_struct;
#if !defined(CONFIG_LAZY_SAVE_FPU)
#if defined(CONFIG_FPU) && !defined(CONFIG_LAZY_SAVE_FPU)
struct fpu_state_struct;
extern asmlinkage void fpu_save(struct fpu_state_struct *);
#define switch_fpu(prev, next) \