[tip:x86/mm] x86/boot: Fix memremap() related build failure

[tip-bot for Ingo Molnar]

Commit-ID:  693bf0aa01b7f9a1b24b2b932d555c6667f17a1a
Gitweb:     http://git.kernel.org/tip/693bf0aa01b7f9a1b24b2b932d555c6667f17a1a
Author:     Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Thu, 20 Jul 2017 11:23:07 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 20 Jul 2017 11:37:58 +0200

x86/boot: Fix memremap() related build failure

The following commit:

  5997efb96756 ("x86/boot: Use memremap() to map the MPF and MPC data")

causes new build failures on certain randconfigs:

  drivers/sfi/sfi_core.c: In function âsfi_map_memoryâ:
  drivers/sfi/sfi_core.c:104:10: error: implicit declaration of function âmemremapâ [-Werror=implicit-function-declaration]
  drivers/sfi/sfi_core.c:104:31: error: âMEMREMAP_WBâ undeclared (first use in this function)

This is a case of parasitic header dependencies: the sfi_core.c file indirectly
includes <linux/io.h> for typical - but not all configs.

Including <linux/io.h> explicitly solves the build failure.

Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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Cc: aryabinin@xxxxxxxxxxxxx
Cc: bp@xxxxxxxxx
Cc: bp@xxxxxxx
Cc: brijesh.singh@xxxxxxx
Cc: corbet@xxxxxxx
Cc: dvyukov@xxxxxxxxxx
Cc: dyoung@xxxxxxxxxx
Cc: glider@xxxxxxxxxx
Cc: konrad.wilk@xxxxxxxxxx
Cc: linux-tip-commits@xxxxxxxxxxxxxxx
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Cc: riel@xxxxxxxxxx
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Cc: thomas.lendacky@xxxxxxx
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Link: http://lkml.kernel.org/r/20170720092307.6xslahuaclmsiffe@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 drivers/sfi/sfi_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/sfi/sfi_core.c b/drivers/sfi/sfi_core.c
index d5ce534..153b3f3 100644
--- a/drivers/sfi/sfi_core.c
+++ b/drivers/sfi/sfi_core.c
@@ -68,6 +68,7 @@
 #include <linux/init.h>
 #include <linux/sfi.h>
 #include <linux/slab.h>
+#include <linux/io.h>
 
 #include "sfi_core.h"