linux-kernel - [PATCH 3.12 32/82] ARM: realview: fix sparsemem build

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Message-Id: <7eebdf0ee7c225ce3e4627e9e9effa9cd3d8bc95.1440407339.git.jslaby@suse.cz>
Date:	Mon, 24 Aug 2015 11:08:52 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Russell King <linux@....linux.org.uk>,
	Linus Walleij <linus.walleij@...aro.org>,
	Guenter Roeck <linux@...ck-us.net>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 32/82] ARM: realview: fix sparsemem build

From: Arnd Bergmann <arnd@...db.de>

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

===============

commit dd94d3558947756b102b1487911acd925224a38c upstream.

Commit b713aa0b15 "ARM: fix asm/memory.h build error" broke some
configurations on mach-realview with sparsemem enabled, which
is missing a definition of PHYS_OFFSET:

arch/arm/include/asm/memory.h:268:42: error: 'PHYS_OFFSET' undeclared (first use in this function)
 #define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
arch/arm/include/asm/dma-mapping.h:104:9: note: in expansion of macro 'PHYS_PFN_OFFSET'
  return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);

An easy workaround is for realview to define PHYS_OFFSET itself,
in the same way we define it for platforms that don't have a private
__virt_to_phys function.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Russell King <linux@....linux.org.uk>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm/mach-realview/include/mach/memory.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-realview/include/mach/memory.h b/arch/arm/mach-realview/include/mach/memory.h
index 2022e092f0ca..db09170e3832 100644
--- a/arch/arm/mach-realview/include/mach/memory.h
+++ b/arch/arm/mach-realview/include/mach/memory.h
@@ -56,6 +56,8 @@
 #define PAGE_OFFSET1	(PAGE_OFFSET + 0x10000000)
 #define PAGE_OFFSET2	(PAGE_OFFSET + 0x30000000)
 
+#define PHYS_OFFSET PLAT_PHYS_OFFSET
+
 #define __phys_to_virt(phys)						\
 	((phys) >= 0x80000000 ?	(phys) - 0x80000000 + PAGE_OFFSET2 :	\
 	 (phys) >= 0x20000000 ?	(phys) - 0x20000000 + PAGE_OFFSET1 :	\
-- 
2.5.0

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