[tip:x86/asm] x86/io: Remove xlate_dev_kmem_ptr() duplication

[tip-bot for Andy Shevchenko <tipbot@zytor.com>]

Commit-ID:  eabc2a7c49c01fc97ff8c764ef7d74276b904af6
Gitweb:     http://git.kernel.org/tip/eabc2a7c49c01fc97ff8c764ef7d74276b904af6
Author:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>
AuthorDate: Fri, 30 Jun 2017 20:09:33 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 24 Jul 2017 11:18:21 +0200

x86/io: Remove xlate_dev_kmem_ptr() duplication

Generic header defines xlate_dev_kmem_ptr().

Reuse it from generic header and remove in x86 code.
Move a description to the generic header as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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
Cc: wsa@the-dreams.de
Link: http://lkml.kernel.org/r/20170630170934.83028-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/include/asm/io.h | 5 -----
 include/asm-generic/io.h  | 3 +++
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 252434b..b3bba2f 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -216,11 +216,6 @@ extern void set_iounmap_nonlazy(void);
 #include <asm-generic/iomap.h>
 
 /*
- * Convert a virtual cached pointer to an uncached pointer
- */
-#define xlate_dev_kmem_ptr(p)	p
-
-/*
  * ISA space is 'always mapped' on a typical x86 system, no need to
  * explicitly ioremap() it. The fact that the ISA IO space is mapped
  * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 395afc8..b4531e3 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -915,6 +915,9 @@ extern void ioport_unmap(void __iomem *p);
 #endif /* CONFIG_GENERIC_IOMAP */
 #endif /* CONFIG_HAS_IOPORT_MAP */
 
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
 #ifndef xlate_dev_kmem_ptr
 #define xlate_dev_kmem_ptr xlate_dev_kmem_ptr
 static inline void *xlate_dev_kmem_ptr(void *addr)