Add patches to fix boot on 64K page aarch64 devices (eg Seattle)

Add the following series that in theory fixes boot on aarch64. It's ACKed
and has pull reqs for upstream so in theory upstream should have tested
this, although I have my doubts. If it is in fact crack just revert and
I'll go and beat ^W work something else out.

fix-memremap-on-ARM.patch

@@ -0,0 +1,156 @@
+From ddce00e38e06f10a12191df6830eb4975364ff99 Mon Sep 17 00:00:00 2001
+From: Peter Robinson <pbrobinson@gmail.com>
+Date: Wed, 30 Mar 2016 12:17:33 +0100
+Subject: [PATCH] fix memremap on ARM
+
+http://www.spinics.net/lists/arm-kernel/msg488703.html
+---
+ arch/arm/include/asm/io.h       | 12 ++++++++++++
+ arch/arm/mm/ioremap.c           | 16 ++++++++++++++--
+ drivers/mtd/maps/pxa2xx-flash.c |  6 +++---
+ kernel/memremap.c               | 11 ++++++++---
+ 4 files changed, 37 insertions(+), 8 deletions(-)
+
+diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
+index 4859820..781ef5f 100644
+--- a/arch/arm/include/asm/io.h
++++ b/arch/arm/include/asm/io.h
+@@ -392,9 +392,18 @@ void __iomem *ioremap(resource_size_t res_cookie, size_t size);
+ #define ioremap ioremap
+ #define ioremap_nocache ioremap
+ 
++/*
++ * Do not use ioremap_cache for mapping memory. Use memremap instead.
++ */
+ void __iomem *ioremap_cache(resource_size_t res_cookie, size_t size);
+ #define ioremap_cache ioremap_cache
+ 
++/*
++ * Do not use ioremap_cached in new code. Provided for the benefit of
++ * the pxa2xx-flash MTD driver only.
++ */
++void __iomem *ioremap_cached(resource_size_t res_cookie, size_t size);
++
+ void __iomem *ioremap_wc(resource_size_t res_cookie, size_t size);
+ #define ioremap_wc ioremap_wc
+ #define ioremap_wt ioremap_wc
+@@ -402,6 +411,9 @@ void __iomem *ioremap_wc(resource_size_t res_cookie, size_t size);
+ void iounmap(volatile void __iomem *iomem_cookie);
+ #define iounmap iounmap
+ 
++void *arch_memremap_wb(phys_addr_t phys_addr, size_t size);
++#define arch_memremap_wb arch_memremap_wb
++
+ /*
+  * io{read,write}{16,32}be() macros
+  */
+diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
+index 66a978d..ff0eed2 100644
+--- a/arch/arm/mm/ioremap.c
++++ b/arch/arm/mm/ioremap.c
+@@ -297,9 +297,10 @@ static void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
+ 	}
+ 
+ 	/*
+-	 * Don't allow RAM to be mapped - this causes problems with ARMv6+
++	 * Don't allow RAM to be mapped with mismatched attributes - this
++	 * causes problems with ARMv6+
+ 	 */
+-	if (WARN_ON(pfn_valid(pfn)))
++	if (WARN_ON(pfn_valid(pfn) && mtype != MT_MEMORY_RW))
+ 		return NULL;
+ 
+ 	area = get_vm_area_caller(size, VM_IOREMAP, caller);
+@@ -380,11 +381,15 @@ void __iomem *ioremap(resource_size_t res_cookie, size_t size)
+ EXPORT_SYMBOL(ioremap);
+ 
+ void __iomem *ioremap_cache(resource_size_t res_cookie, size_t size)
++	__alias(ioremap_cached);
++
++void __iomem *ioremap_cached(resource_size_t res_cookie, size_t size)
+ {
+ 	return arch_ioremap_caller(res_cookie, size, MT_DEVICE_CACHED,
+ 				   __builtin_return_address(0));
+ }
+ EXPORT_SYMBOL(ioremap_cache);
++EXPORT_SYMBOL(ioremap_cached);
+ 
+ void __iomem *ioremap_wc(resource_size_t res_cookie, size_t size)
+ {
+@@ -414,6 +419,13 @@ __arm_ioremap_exec(phys_addr_t phys_addr, size_t size, bool cached)
+ 			__builtin_return_address(0));
+ }
+ 
++void *arch_memremap_wb(phys_addr_t phys_addr, size_t size)
++{
++	return (__force void *)arch_ioremap_caller(phys_addr, size,
++						   MT_MEMORY_RW,
++						   __builtin_return_address(0));
++}
++
+ void __iounmap(volatile void __iomem *io_addr)
+ {
+ 	void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
+diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c
+index 7497090..2cde28e 100644
+--- a/drivers/mtd/maps/pxa2xx-flash.c
++++ b/drivers/mtd/maps/pxa2xx-flash.c
+@@ -71,8 +71,8 @@ static int pxa2xx_flash_probe(struct platform_device *pdev)
+ 		       info->map.name);
+ 		return -ENOMEM;
+ 	}
+-	info->map.cached = memremap(info->map.phys, info->map.size,
+-			MEMREMAP_WB);
++	info->map.cached =
++		ioremap_cached(info->map.phys, info->map.size);
+ 	if (!info->map.cached)
+ 		printk(KERN_WARNING "Failed to ioremap cached %s\n",
+ 		       info->map.name);
+@@ -111,7 +111,7 @@ static int pxa2xx_flash_remove(struct platform_device *dev)
+ 	map_destroy(info->mtd);
+ 	iounmap(info->map.virt);
+ 	if (info->map.cached)
+-		memunmap(info->map.cached);
++		iounmap(info->map.cached);
+ 	kfree(info);
+ 	return 0;
+ }
+diff --git a/kernel/memremap.c b/kernel/memremap.c
+index a6d3823..6723c77 100644
+--- a/kernel/memremap.c
++++ b/kernel/memremap.c
+@@ -27,6 +27,13 @@ __weak void __iomem *ioremap_cache(resource_size_t offset, unsigned long size)
+ }
+ #endif
+ 
++#ifndef arch_memremap_wb
++static void *arch_memremap_wb(resource_size_t offset, unsigned long size)
++{
++	return (__force void *)ioremap_cache(offset, size);
++}
++#endif
++
+ static void *try_ram_remap(resource_size_t offset, size_t size)
+ {
+ 	unsigned long pfn = PHYS_PFN(offset);
+@@ -34,7 +41,7 @@ static void *try_ram_remap(resource_size_t offset, size_t size)
+ 	/* In the simple case just return the existing linear address */
+ 	if (pfn_valid(pfn) && !PageHighMem(pfn_to_page(pfn)))
+ 		return __va(offset);
+-	return NULL; /* fallback to ioremap_cache */
++	return arch_memremap_wb(offset, size);
+ }
+ 
+ /**
+@@ -89,8 +96,6 @@ void *memremap(resource_size_t offset, size_t size, unsigned long flags)
+ 		 */
+ 		if (is_ram == REGION_INTERSECTS)
+ 			addr = try_ram_remap(offset, size);
+-		if (!addr)
+-			addr = ioremap_cache(offset, size);
+ 	}
+ 
+ 	/*
+-- 
+2.7.3
+

kernel.spec

@@ -507,6 +507,9 @@ Patch422: geekbox-v4-device-tree-support.patch
 # http://www.spinics.net/lists/arm-kernel/msg483898.html
 Patch423: Initial-AllWinner-A64-and-PINE64-support.patch
 
+# http://www.spinics.net/lists/arm-kernel/msg488703.html
+Patch424: fix-memremap-on-ARM.patch
+
 # http://patchwork.ozlabs.org/patch/587554/
 Patch430: ARM-tegra-usb-no-reset.patch
 
@@ -2158,6 +2161,7 @@ fi
 * Wed Mar 30 2016 Peter Robinson <pbrobinson@fedoraproject.org>
 - Add ARMv7 mvebu fixes headed upstream
 - Minor ARMv7 cleanups
+- Add patches to fix boot on 64K page aarch64 devices (eg Seattle)
 
 * Sun Mar 27 2016 Josh Boyer <jwboyer@fedoraproject.org> - 4.6.0-0.rc1.git0.1
 - Linux v4.6-rc1