From: Bjørn Mork <bjorn@mork.no>
Date: Sun, 7 Mar 2021 18:23:01 +0000 (+0100)
Subject: MIPS: vmlinux.lds.S: align raw appended dtb to 8 bytes
X-Git-Tag: accepted/tizen/unified/20230118.172025~7562^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6654111c893fec1516d83046d2b237e83e0d5967;p=platform%2Fkernel%2Flinux-rpi.git

MIPS: vmlinux.lds.S: align raw appended dtb to 8 bytes

The devicetree specification requires 8-byte alignment in
memory. This is now enforced by libfdt since commit 79edff12060f
("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
which included the upstream commit 5e735860c478 ("libfdt: Check for
8-byte address alignment in fdt_ro_probe_()").

This broke the MIPS raw appended DTBs which would be appended to
the image immediately following the initramfs section.  This ends
with a 32bit size, resulting in a 4-byte alignment of the DTB.

Fix by padding with zeroes to 8-bytes when MIPS_RAW_APPENDED_DTB
is defined.

Fixes: 79edff12060f ("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---

diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 4b4e39b..1234834 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -173,7 +173,11 @@ SECTIONS
 #endif
 
 #ifdef CONFIG_MIPS_RAW_APPENDED_DTB
-	STRUCT_ALIGN();
+	.fill : {
+		FILL(0);
+		BYTE(0);
+		. = ALIGN(8);
+	}
 	__appended_dtb = .;
 	/* leave space for appended DTB */
 	. += 0x100000;