Patch "of/fdt: make memblock maximum physical address arch configurable" has been added to the 4.2-stable tree

Patch "of/fdt: make memblock maximum physical address arch configurable" has been added to the 4.2-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    of/fdt: make memblock maximum physical address arch configurable

to the 4.2-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:
     of-fdt-make-memblock-maximum-physical-address-arch-configurable.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8eafeb48022816513abc4f440bdad4c350fe81a3 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Tue, 18 Aug 2015 10:34:41 +0100
Subject: of/fdt: make memblock maximum physical address arch configurable

From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

commit 8eafeb48022816513abc4f440bdad4c350fe81a3 upstream.

When parsing the memory nodes to populate the memblock memory
table, we check against high and low limits and clip any memory
that exceeds either one of them.

However, for arm64, the high limit of (phys_addr_t)~0 is not very
meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there
may be other constraints that limit the memory ranges that we can
support.

So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only
define it if the arch does not supply a definition of its own.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/of/fdt.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -967,7 +967,9 @@ int __init early_init_dt_scan_chosen(uns
 }
 
 #ifdef CONFIG_HAVE_MEMBLOCK
-#define MAX_PHYS_ADDR	((phys_addr_t)~0)
+#ifndef MAX_MEMBLOCK_ADDR
+#define MAX_MEMBLOCK_ADDR	((phys_addr_t)~0)
+#endif
 
 void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
 {
@@ -984,16 +986,16 @@ void __init __weak early_init_dt_add_mem
 	}
 	size &= PAGE_MASK;
 
-	if (base > MAX_PHYS_ADDR) {
+	if (base > MAX_MEMBLOCK_ADDR) {
 		pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
 				base, base + size);
 		return;
 	}
 
-	if (base + size - 1 > MAX_PHYS_ADDR) {
+	if (base + size - 1 > MAX_MEMBLOCK_ADDR) {
 		pr_warning("Ignoring memory range 0x%llx - 0x%llx\n",
-				((u64)MAX_PHYS_ADDR) + 1, base + size);
-		size = MAX_PHYS_ADDR - base + 1;
+				((u64)MAX_MEMBLOCK_ADDR) + 1, base + size);
+		size = MAX_MEMBLOCK_ADDR - base + 1;
 	}
 
 	if (base + size < phys_offset) {


Patches currently in stable-queue which might be from ard.biesheuvel@linaro.org are

queue-4.2/arm64-set-max_memblock_addr-according-to-linear-region-size.patch
queue-4.2/arm64-flush-fp-simd-state-correctly-after-execve.patch
queue-4.2/of-fdt-make-memblock-maximum-physical-address-arch-configurable.patch