This is a note to let you know that I've just added the patch titled
ARM: fix asm/memory.h build error
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-fix-asm-memory.h-build-error.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From b713aa0b15015a65ad5421543b80df86de043d62 Mon Sep 17 00:00:00 2001
From: Russell King <[email protected]>
Date: Tue, 10 Dec 2013 19:21:08 +0000
Subject: ARM: fix asm/memory.h build error
From: Russell King <[email protected]>
commit b713aa0b15015a65ad5421543b80df86de043d62 upstream.
Jason Gunthorpe reports a build failure when ARM_PATCH_PHYS_VIRT is
not defined:
In file included from arch/arm/include/asm/page.h:163:0,
from include/linux/mm_types.h:16,
from include/linux/sched.h:24,
from arch/arm/kernel/asm-offsets.c:13:
arch/arm/include/asm/memory.h: In function '__virt_to_phys':
arch/arm/include/asm/memory.h:244:40: error: 'PHYS_OFFSET' undeclared (first
use in this function)
arch/arm/include/asm/memory.h:244:40: note: each undeclared identifier is
reported only once for each function it appears in
arch/arm/include/asm/memory.h: In function '__phys_to_virt':
arch/arm/include/asm/memory.h:249:13: error: 'PHYS_OFFSET' undeclared (first
use in this function)
Fixes: ca5a45c06cd4 ("ARM: mm: use phys_addr_t appropriately in p2v and v2p
conversions")
Tested-By: Jason Gunthorpe <[email protected]>
Signed-off-by: Russell King <[email protected]>
[hpy: Backported to 3.10:
- adjust the context
- MPU is not supported by 3.10, so ignore fix to MPU compared with the
original patch.]
Signed-off-by: Hou Pengyang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/include/asm/memory.h | 31 +++++++++++++++----------------
arch/arm/kernel/head.S | 2 +-
2 files changed, 16 insertions(+), 17 deletions(-)
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -98,23 +98,19 @@
#define TASK_UNMAPPED_BASE UL(0x00000000)
#endif
-#ifndef PHYS_OFFSET
-#define PHYS_OFFSET UL(CONFIG_DRAM_BASE)
-#endif
-
#ifndef END_MEM
#define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
#endif
#ifndef PAGE_OFFSET
-#define PAGE_OFFSET (PHYS_OFFSET)
+#define PAGE_OFFSET PLAT_PHYS_OFFSET
#endif
/*
* The module can be at any place in ram in nommu mode.
*/
#define MODULES_END (END_MEM)
-#define MODULES_VADDR (PHYS_OFFSET)
+#define MODULES_VADDR PAGE_OFFSET
#define XIP_VIRT_ADDR(physaddr) (physaddr)
@@ -141,6 +137,16 @@
#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
+/*
+ * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
+ * memory. This is used for XIP and NoMMU kernels, or by kernels which
+ * have their own mach/memory.h. Assembly code must always use
+ * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
+ */
+#ifndef PLAT_PHYS_OFFSET
+#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
+#endif
+
#ifndef __ASSEMBLY__
/*
@@ -183,22 +189,15 @@ static inline unsigned long __phys_to_vi
return t;
}
#else
+
+#define PHYS_OFFSET PLAT_PHYS_OFFSET
+
#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
-#endif
-#endif
-#endif /* __ASSEMBLY__ */
-#ifndef PHYS_OFFSET
-#ifdef PLAT_PHYS_OFFSET
-#define PHYS_OFFSET PLAT_PHYS_OFFSET
-#else
-#define PHYS_OFFSET UL(CONFIG_PHYS_OFFSET)
#endif
#endif
-#ifndef __ASSEMBLY__
-
/*
* PFNs are used to describe any physical page; this means
* PFN 0 == physical address 0.
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -109,7 +109,7 @@ ENTRY(stext)
sub r4, r3, r4 @ (PHYS_OFFSET - PAGE_OFFSET)
add r8, r8, r4 @ PHYS_OFFSET
#else
- ldr r8, =PHYS_OFFSET @ always constant in this case
+ ldr r8, =PLAT_PHYS_OFFSET @ always constant in this case
#endif
/*
Patches currently in stable-queue which might be from
[email protected] are
queue-3.10/arm-dma-ensure-that-old-section-mappings-are-flushed-from-the-tlb.patch
queue-3.10/arm-8109-1-mm-modify-pte_write-and-pmd_write-logic-for-lpae.patch
queue-3.10/arm-7866-1-include-asm-use-long-long-instead-of-u64-within-atomic.h.patch
queue-3.10/arm-7829-1-add-.text.unlikely-and-.text.hot-to-arm-unwind-tables.patch
queue-3.10/arm-7931-1-correct-virt_addr_valid.patch
queue-3.10/arm-8108-1-mm-introduce-pte-pmd-_isset-and.patch
queue-3.10/arm-7867-1-include-asm-use-int-instead-of-unsigned-long-for-oldval-in-atomic_cmpxchg.patch
queue-3.10/arm-fix-asm-memory.h-build-error.patch
--
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