linux-kernel - [PATCH 4.17 02/21] x86: i8259: Add missing include file

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Message-Id: <20180816171612.333713933@linuxfoundation.org>
Date:   Thu, 16 Aug 2018 20:45:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sebastian Gottschall <s.gottschall@...wrt.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 4.17 02/21] x86: i8259: Add missing include file

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Guenter Roeck <linux@...ck-us.net>

commit 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 upstream.

i8259.h uses inb/outb and thus needs to include asm/io.h to avoid the
following build error, as seen with x86_64:defconfig and CONFIG_SMP=n.

  In file included from drivers/rtc/rtc-cmos.c:45:0:
  arch/x86/include/asm/i8259.h: In function 'inb_pic':
  arch/x86/include/asm/i8259.h:32:24: error:
	implicit declaration of function 'inb'

  arch/x86/include/asm/i8259.h: In function 'outb_pic':
  arch/x86/include/asm/i8259.h:45:2: error:
	implicit declaration of function 'outb'

Reported-by: Sebastian Gottschall <s.gottschall@...wrt.com>
Suggested-by: Sebastian Gottschall <s.gottschall@...wrt.com>
Fixes: 447ae3166702 ("x86: Don't include linux/irq.h from asm/hardirq.h")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/include/asm/i8259.h |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/include/asm/i8259.h
+++ b/arch/x86/include/asm/i8259.h
@@ -3,6 +3,7 @@
 #define _ASM_X86_I8259_H
 
 #include <linux/delay.h>
+#include <asm/io.h>
 
 extern unsigned int cached_irq_mask;