[PATCH 3.19 083/175] MIPS: Export FP functions used by lose_fpu(1) for KVM

Greg Kroah-Hartman
2015-03-04T06:20:52Z

From: James Hogan <james.hogan@imgtec.com>

commit 3ce465e04bfd8de9956d515d6e9587faac3375dc upstream.

Export the _save_fp asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.

This fixes the following build error when CONFIG_KVM=m due to commit
f798217dfd03 ("KVM: MIPS: Don't leak FPU/DSP to guest"):

ERROR: "_save_fp" [arch/mips/kvm/kvm.ko] undefined!

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9260/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/mips/kernel/mips_ksyms.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/arch/mips/kernel/mips_ksyms.c
+++ b/arch/mips/kernel/mips_ksyms.c
@@ -14,6 +14,7 @@
#include <linux/mm.h>
#include <asm/uaccess.h>
#include <asm/ftrace.h>
+#include <asm/fpu.h>

extern void *__bzero(void *__s, size_t __count);
extern long __strncpy_from_kernel_nocheck_asm(char *__to,
@@ -32,6 +33,11 @@ extern long __strnlen_user_nocheck_asm(c
extern long __strnlen_user_asm(const char *s);

/*
+ * Core architecture code
+ */
+EXPORT_SYMBOL_GPL(_save_fp);
+
+/*
* String functions
*/
EXPORT_SYMBOL(memset);