> arch/um/Kconfig | 2 +-
> arch/um/include/asm/fpu/api.h | 9 ++--
> arch/um/include/asm/thread_info.h | 4 +-
> arch/um/kernel/Makefile | 4 ++
> arch/um/kernel/fpu.c | 71 +++++++++++++++++++++++++++++++
> arch/um/kernel/irq.c | 2 +
> arch/um/kernel/tlb.c | 13 ++++++
In addition to what Benjamin pointed out (FPU state is in the MM
process, so we probably don't care about save/restore), this also
doesn't build any more, at least it needs:
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -31,7 +31,6 @@ obj-y += syscalls_64.o vdso/
subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o \
../lib/memmove_64.o ../lib/memset_64.o
-subarch-$(CONFIG_PREEMPTION) += ../entry/thunk_64.o
endif
git am also complained about the extra blank line at EOF here:
> +EXPORT_SYMBOL_GPL(kernel_fpu_end);
> +
johannes
