x86/io: Define IO accessors by preprocessor

As a preparatory to use generic IO accessor helpers we need to define
architecture dependent functions via preprocessor to let world know we
have them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Baolin Wang <baolin.wang@spreadtrum.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: intel-gfx@lists.freedesktop.org
Cc: linux-i2c@vger.kernel.org
Link: http://lkml.kernel.org/r/20170630170934.83028-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/include/asm/io.h

@@ -69,6 +69,9 @@ build_mmio_write(__writeb, "b", unsigned char, "q", )
 build_mmio_write(__writew, "w", unsigned short, "r", )
 build_mmio_write(__writel, "l", unsigned int, "r", )
 
+#define readb readb
+#define readw readw
+#define readl readl
 #define readb_relaxed(a) __readb(a)
 #define readw_relaxed(a) __readw(a)
 #define readl_relaxed(a) __readl(a)
@@ -76,6 +79,9 @@ build_mmio_write(__writel, "l", unsigned int, "r", )
 #define __raw_readw __readw
 #define __raw_readl __readl
 
+#define writeb writeb
+#define writew writew
+#define writel writel
 #define writeb_relaxed(v, a) __writeb(v, a)
 #define writew_relaxed(v, a) __writew(v, a)
 #define writel_relaxed(v, a) __writel(v, a)
@@ -119,6 +125,7 @@ static inline phys_addr_t virt_to_phys(volatile void *address)
 {
 	return __pa(address);
 }
+#define virt_to_phys virt_to_phys
 
 /**
  *	phys_to_virt	-	map physical address to virtual
@@ -137,6 +144,7 @@ static inline void *phys_to_virt(phys_addr_t address)
 {
 	return __va(address);
 }
+#define phys_to_virt phys_to_virt
 
 /*
  * Change "struct page" to physical address.
@@ -169,11 +177,14 @@ static inline unsigned int isa_virt_to_bus(volatile void *address)
  * else, you probably want one of the following.
  */
 extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
+#define ioremap_nocache ioremap_nocache
 extern void __iomem *ioremap_uc(resource_size_t offset, unsigned long size);
 #define ioremap_uc ioremap_uc
 
 extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
+#define ioremap_cache ioremap_cache
 extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size, unsigned long prot_val);
+#define ioremap_prot ioremap_prot
 
 /**
  * ioremap     -   map bus memory into CPU space
@@ -193,8 +204,10 @@ static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
 {
 	return ioremap_nocache(offset, size);
 }
+#define ioremap ioremap
 
 extern void iounmap(volatile void __iomem *addr);
+#define iounmap iounmap
 
 extern void set_iounmap_nonlazy(void);
 
@@ -220,6 +233,7 @@ memset_io(volatile void __iomem *addr, unsigned char val, size_t count)
 {
 	memset((void __force *)addr, val, count);
 }
+#define memset_io(dst,c,count) memset_io(dst,c,count)
 
 /**
  * memcpy_fromio	Copy a block of data from I/O memory
@@ -234,6 +248,7 @@ memcpy_fromio(void *dst, const volatile void __iomem *src, size_t count)
 {
 	memcpy(dst, (const void __force *)src, count);
 }
+#define memcpy_fromio(to,from,count) memcpy_fromio(to,from,count)
 
 /**
  * memcpy_toio		Copy a block of data into I/O memory
@@ -248,6 +263,7 @@ memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
 {
 	memcpy((void __force *)dst, src, count);
 }
+#define memcpy_toio(to,from,count) memcpy_toio(to,from,count)
 
 /*
  * ISA space is 'always mapped' on a typical x86 system, no need to
@@ -341,13 +357,38 @@ BUILDIO(b, b, char)
 BUILDIO(w, w, short)
 BUILDIO(l, , int)
 
+#define inb inb
+#define inw inw
+#define inl inl
+#define inb_p inb_p
+#define inw_p inw_p
+#define inl_p inl_p
+#define insb insb
+#define insw insw
+#define insl insl
+
+#define outb outb
+#define outw outw
+#define outl outl
+#define outb_p outb_p
+#define outw_p outw_p
+#define outl_p outl_p
+#define outsb outsb
+#define outsw outsw
+#define outsl outsl
+
 extern void *xlate_dev_mem_ptr(phys_addr_t phys);
 extern void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
 
+#define xlate_dev_mem_ptr xlate_dev_mem_ptr
+#define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
+
 extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
 				enum page_cache_mode pcm);
 extern void __iomem *ioremap_wc(resource_size_t offset, unsigned long size);
+#define ioremap_wc ioremap_wc
 extern void __iomem *ioremap_wt(resource_size_t offset, unsigned long size);
+#define ioremap_wt ioremap_wt
 
 extern bool is_early_ioremap_ptep(pte_t *ptep);