aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJames Hogan <james.hogan@imgtec.com>2015-02-10 10:02:59 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-06 14:40:54 -0800
commit813a631f08c7112f12a3da9f63da632c925a8b37 (patch)
tree61829350404810ef9dc8d0b49d54a1100e1fd2d7
parent4f2e84da8a809db7747dd9712a120a44bebd92f3 (diff)
downloadlinux-linaro-stable-813a631f08c7112f12a3da9f63da632c925a8b37.tar.gz
MIPS: Export FP functions used by lose_fpu(1) for KVM
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> [james.hogan@imgtec.com: Only export when CPU_R4K_FPU=y prior to v3.16, so as not to break the Octeon build which excludes FPU support. KVM depends on MIPS32r2 anyway.] Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/mips/kernel/mips_ksyms.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c
index 6e58e97fcd39..cedeb5686eb5 100644
--- 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_user_nocheck_asm(char *__to,
@@ -26,6 +27,13 @@ extern long __strnlen_user_nocheck_asm(const char *s);
extern long __strnlen_user_asm(const char *s);
/*
+ * Core architecture code
+ */
+#ifdef CONFIG_CPU_R4K_FPU
+EXPORT_SYMBOL_GPL(_save_fp);
+#endif
+
+/*
* String functions
*/
EXPORT_SYMBOL(memset);