diff --git a/include/asm-alpha/io.h b/include/asm-alpha/io.h
index f5ae98c..5d15af2 100644
--- a/include/asm-alpha/io.h
+++ b/include/asm-alpha/io.h
@@ -533,19 +533,6 @@
 #define eth_io_copy_and_sum(skb,src,len,unused) \
   memcpy_fromio((skb)->data,src,len)
 
-static inline int
-check_signature(const volatile void __iomem *io_addr,
-		const unsigned char *signature, int length)
-{
-	do {
-		if (readb(io_addr) != *signature)
-			return 0;
-		io_addr++;
-		signature++;
-	} while (--length);
-	return 1;
-}
-
 /*
  * The Alpha Jensen hardware for some rather strange reason puts
  * the RTC clock at 0x170 instead of 0x70. Probably due to some
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index 34aaaac..ae999fd 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -193,23 +193,6 @@
 #define eth_io_copy_and_sum(s,c,l,b) \
 				eth_copy_and_sum((s),__mem_pci(c),(l),(b))
 
-static inline int
-check_signature(void __iomem *io_addr, const unsigned char *signature,
-		int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 #elif !defined(readb)
 
 #define readb(c)			(__readwrite_bug("readb"),0)
diff --git a/include/asm-frv/io.h b/include/asm-frv/io.h
index 7765f55..20e44fe0 100644
--- a/include/asm-frv/io.h
+++ b/include/asm-frv/io.h
@@ -385,27 +385,6 @@
  */
 #define xlate_dev_kmem_ptr(p)	p
 
-/*
- * Check BIOS signature
- */
-static inline int check_signature(volatile void __iomem *io_addr,
-				  const unsigned char *signature, int length)
-{
-	int retval = 0;
-
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-
-	retval = 1;
-out:
-	return retval;
-}
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_IO_H */
diff --git a/include/asm-i386/io.h b/include/asm-i386/io.h
index b3724fe..68df0dc3 100644
--- a/include/asm-i386/io.h
+++ b/include/asm-i386/io.h
@@ -224,33 +224,6 @@
 
 #define eth_io_copy_and_sum(a,b,c,d)		eth_copy_and_sum((a),(void __force *)(b),(c),(d))
 
-/**
- *	check_signature		-	find BIOS signatures
- *	@io_addr: mmio address to check 
- *	@signature:  signature block
- *	@length: length of signature
- *
- *	Perform a signature comparison with the mmio address io_addr. This
- *	address should have been obtained by ioremap.
- *	Returns 1 on a match.
- */
- 
-static inline int check_signature(volatile void __iomem * io_addr,
-	const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /*
  *	Cache management
  *
diff --git a/include/asm-m32r/io.h b/include/asm-m32r/io.h
index 70ad1c9..d06933b 100644
--- a/include/asm-m32r/io.h
+++ b/include/asm-m32r/io.h
@@ -166,38 +166,6 @@
 
 #define flush_write_buffers() do { } while (0)  /* M32R_FIXME */
 
-/**
- *	check_signature		-	find BIOS signatures
- *	@io_addr: mmio address to check
- *	@signature:  signature block
- *	@length: length of signature
- *
- *	Perform a signature comparison with the ISA mmio address io_addr.
- *	Returns 1 on a match.
- *
- *	This function is deprecated. New drivers should use ioremap and
- *	check_signature.
- */
-
-static inline int check_signature(void __iomem *io_addr,
-        const unsigned char *signature, int length)
-{
-        int retval = 0;
-#if 0
-printk("check_signature\n");
-        do {
-                if (readb(io_addr) != *signature)
-                        goto out;
-                io_addr++;
-                signature++;
-                length--;
-        } while (length);
-        retval = 1;
-out:
-#endif
-        return retval;
-}
-
 static inline void
 memset_io(volatile void __iomem *addr, unsigned char val, int count)
 {
diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
index df624e1..c2d124b 100644
--- a/include/asm-mips/io.h
+++ b/include/asm-mips/io.h
@@ -562,32 +562,6 @@
 #define eth_io_copy_and_sum(skb,src,len,unused) memcpy_fromio((skb)->data,(src),(len))
 
 /*
- *     check_signature         -       find BIOS signatures
- *     @io_addr: mmio address to check
- *     @signature:  signature block
- *     @length: length of signature
- *
- *     Perform a signature comparison with the mmio address io_addr. This
- *     address should have been obtained by ioremap.
- *     Returns 1 on a match.
- */
-static inline int check_signature(char __iomem *io_addr,
-	const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
-/*
  * The caches on some architectures aren't dma-coherent and have need to
  * handle this in software.  There are three types of operations that
  * can be applied to dma buffers.
diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h
index cbbd8c6..3baff8b 100644
--- a/include/asm-powerpc/io.h
+++ b/include/asm-powerpc/io.h
@@ -404,32 +404,6 @@
 
 #include <asm/eeh.h>
 
-/**
- *	check_signature		-	find BIOS signatures
- *	@io_addr: mmio address to check
- *	@signature:  signature block
- *	@length: length of signature
- *
- *	Perform a signature comparison with the mmio address io_addr. This
- *	address should have been obtained by ioremap.
- *	Returns 1 on a match.
- */
-static inline int check_signature(const volatile void __iomem * io_addr,
-	const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /* Nothing to do */
 
 #define dma_cache_inv(_start,_size)		do { } while (0)
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
index 3d9a9e6..a4c411b 100644
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -439,22 +439,6 @@
 #define iobarrier_r()  eieio()
 #define iobarrier_w()  eieio()
 
-static inline int check_signature(volatile void __iomem * io_addr,
-	const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /*
  * Here comes the ppc implementation of the IOMAP 
  * interfaces.
diff --git a/include/asm-sh/io.h b/include/asm-sh/io.h
index ed12d38..a0e55b0 100644
--- a/include/asm-sh/io.h
+++ b/include/asm-sh/io.h
@@ -304,22 +304,6 @@
 #define iounmap(addr)					\
 	__iounmap((addr))
 
-static inline int check_signature(char __iomem *io_addr,
-			const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /*
  * The caches on some architectures aren't dma-coherent and have need to
  * handle this in software.  There are three types of operations that
diff --git a/include/asm-sh64/io.h b/include/asm-sh64/io.h
index 252fedb..14d8e7b 100644
--- a/include/asm-sh64/io.h
+++ b/include/asm-sh64/io.h
@@ -178,22 +178,6 @@
 unsigned long onchip_remap(unsigned long addr, unsigned long size, const char* name);
 extern void onchip_unmap(unsigned long vaddr);
 
-static __inline__ int check_signature(volatile void __iomem *io_addr,
-			const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /*
  * The caches on some architectures aren't dma-coherent and have need to
  * handle this in software.  There are three types of operations that
diff --git a/include/asm-sparc64/io.h b/include/asm-sparc64/io.h
index 0056770..30b912d 100644
--- a/include/asm-sparc64/io.h
+++ b/include/asm-sparc64/io.h
@@ -440,21 +440,6 @@
 
 #define memcpy_toio(d,s,sz)	_memcpy_toio(d,s,sz)
 
-static inline int check_signature(void __iomem *io_addr,
-				  const unsigned char *signature,
-				  int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature++)
-			goto out;
-		io_addr++;
-	} while (--length);
-	retval = 1;
-out:
-	return retval;
-}
-
 #define mmiowb()
 
 #ifdef __KERNEL__
diff --git a/include/asm-x86_64/io.h b/include/asm-x86_64/io.h
index 70e91fe..6ee9fad 100644
--- a/include/asm-x86_64/io.h
+++ b/include/asm-x86_64/io.h
@@ -254,33 +254,6 @@
 
 #define eth_io_copy_and_sum(a,b,c,d)		eth_copy_and_sum((a),(void *)(b),(c),(d))
 
-/**
- *	check_signature		-	find BIOS signatures
- *	@io_addr: mmio address to check 
- *	@signature:  signature block
- *	@length: length of signature
- *
- *	Perform a signature comparison with the mmio address io_addr. This
- *	address should have been obtained by ioremap.
- *	Returns 1 on a match.
- */
- 
-static inline int check_signature(void __iomem *io_addr,
-	const unsigned char *signature, int length)
-{
-	int retval = 0;
-	do {
-		if (readb(io_addr) != *signature)
-			goto out;
-		io_addr++;
-		signature++;
-		length--;
-	} while (length);
-	retval = 1;
-out:
-	return retval;
-}
-
 /* Nothing to do */
 
 #define dma_cache_inv(_start,_size)		do { } while (0)
diff --git a/include/linux/io.h b/include/linux/io.h
index 2ad96c3..81877ea 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -28,4 +28,31 @@
 int ioremap_page_range(unsigned long addr, unsigned long end,
 		       unsigned long phys_addr, pgprot_t prot);
 
+/**
+ *	check_signature		-	find BIOS signatures
+ *	@io_addr: mmio address to check
+ *	@signature:  signature block
+ *	@length: length of signature
+ *
+ *	Perform a signature comparison with the mmio address io_addr. This
+ *	address should have been obtained by ioremap.
+ *	Returns 1 on a match.
+ */
+
+static inline int check_signature(const volatile void __iomem *io_addr,
+	const unsigned char *signature, int length)
+{
+	int retval = 0;
+	do {
+		if (readb(io_addr) != *signature)
+			goto out;
+		io_addr++;
+		signature++;
+		length--;
+	} while (length);
+	retval = 1;
+out:
+	return retval;
+}
+
 #endif /* _LINUX_IO_H */