[PATCH] Merge commit 'a849088aa1' from rmk/fixes into cleanup/io-pci

[Arnd Bergmann]

As Stephen Rothwell reports, a849088aa155 ("ARM: Fix ioremap() of
address zero") from the arm-current tree and commit c2794437091a ("ARM:
Add fixed PCI i/o mapping") from the arm-soc tree conflict in
a nontrivial way in arch/arm/mm/mmu.c.

Rob Herring explains:
The PCI i/o reserved area has a dummy physical address of 0 and
needs to be skipped by ioremap searches. So we don't set
VM_ARM_STATIC_MAPPING to prevent matches by ioremap. The vm_struct
settings don't really matter when we do the real mapping of the
i/o space.

Since commit a849088aa155 is at the start of the fixes branch
in the arm tree, we can merge it into the branch that contains
the other ioremap changes.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>

diff --cc arch/arm/Kconfig
index 58bb75e,6d6e18f..01790958
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig

diff --cc arch/arm/mm/mmu.c
index 714a7fd,eab94bc..a7a9e41
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@@ -792,19 -785,6 +786,19 @@@ void __init iotable_init(struct map_des
  	}
  }
  
 +void __init vm_reserve_area_early(unsigned long addr, unsigned long size,
 +				  void *caller)
 +{
 +	struct vm_struct *vm;
 +
 +	vm = early_alloc_aligned(sizeof(*vm), __alignof__(*vm));
 +	vm->addr = (void *)addr;
 +	vm->size = size;
- 	vm->flags = VM_IOREMAP | VM_ARM_STATIC_MAPPING;
++	vm->flags = VM_IOREMAP | VM_ARM_EMPTY_MAPPING;
 +	vm->caller = caller;
 +	vm_area_add_early(vm);
 +}
 +
  #ifndef CONFIG_ARM_LPAE
  
  /*
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