[RFC 6/7] x86: Move kernel_fpu_using to asm/i387.h

[Huang Ying <ying.huang@intel.com>]

This is used by AES-NI accelerated AES implementation and PCLMULQDQ
accelerated GHASH implementation.

Signed-off-by: Huang Ying <ying.huang@intel.com>

---
 arch/x86/crypto/aesni-intel_glue.c |    7 -------
 arch/x86/include/asm/i387.h        |    7 +++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -59,13 +59,6 @@ asmlinkage void aesni_cbc_enc(struct cry
 asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
 			      const u8 *in, unsigned int len, u8 *iv);
 
-static inline int kernel_fpu_using(void)
-{
-	if (in_interrupt() && !(read_cr0() & X86_CR0_TS))
-		return 1;
-	return 0;
-}
-
 static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
 {
 	unsigned long addr = (unsigned long)raw_ctx;
--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -302,6 +302,13 @@ static inline void kernel_fpu_end(void)
 	preempt_enable();
 }
 
+static inline int kernel_fpu_using(void)
+{
+	if (in_interrupt() && !(read_cr0() & X86_CR0_TS))
+		return 1;
+	return 0;
+}
+
 /*
  * Some instructions like VIA's padlock instructions generate a spurious
  * DNA fault but don't modify SSE registers. And these instructions