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[PATCH 1/2] MIPS: Export FP functions used by lose_fpu(1) for KVM

To: Paolo Bonzini <pbonzini@redhat.com>, Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 1/2] MIPS: Export FP functions used by lose_fpu(1) for KVM
From: James Hogan <james.hogan@imgtec.com>
Date: Tue, 10 Feb 2015 10:02:59 +0000
Cc: James Hogan <james.hogan@imgtec.com>, Paul Burton <paul.burton@imgtec.com>, Gleb Natapov <gleb@kernel.org>, <kvm@vger.kernel.org>, <linux-mips@linux-mips.org>, <stable@vger.kernel.org>
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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!

Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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
Cc: <stable@vger.kernel.org> # 3.10+
---
 arch/mips/kernel/mips_ksyms.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c
index 17eaf0cf760c..167ce3fae398 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_kernel_nocheck_asm(char *__to,
@@ -32,6 +33,11 @@ extern long __strnlen_user_nocheck_asm(const char *s);
 extern long __strnlen_user_asm(const char *s);
 
 /*
+ * Core architecture code
+ */
+EXPORT_SYMBOL_GPL(_save_fp);
+
+/*
  * String functions
  */
 EXPORT_SYMBOL(memset);
-- 
2.0.5


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