[openwrt/openwrt] bmips: add JFFS2 unaligned access patch

[LEDE Commits]

noltari pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/117b833d61c0903e110b22cc2715041b606425e2

commit 117b833d61c0903e110b22cc2715041b606425e2
Author: Álvaro Fernández Rojas <noltari at gmail.com>
AuthorDate: Mon Feb 22 21:36:11 2021 +0100

    bmips: add JFFS2 unaligned access patch
    
    This patch is also needed on bmips if SMP is enabled.
    
    Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
---
 ...around-unaligned-accesses-failing-on-bcm6.patch | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/target/linux/bmips/patches-5.10/800-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch b/target/linux/bmips/patches-5.10/800-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
new file mode 100644
index 0000000000..d98d27c6b4
--- /dev/null
+++ b/target/linux/bmips/patches-5.10/800-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
@@ -0,0 +1,26 @@
+From ff3409ab17d56450943364ba49a16960e3cdda9b Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo at openwrt.org>
+Date: Sun, 6 Apr 2014 22:33:16 +0200
+Subject: [RFC] jffs2: work around unaligned accesses failing on bcm63xx/smp
+
+Unligned memcpy_fromio randomly fails with an unaligned dst. Work around
+it by ensuring we are always doing aligned copies.
+
+Should fix filename corruption in jffs2 with SMP.
+
+Signed-off-by: Jonas Gorski <jogo at openwrt.org>
+---
+ fs/jffs2/nodelist.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/fs/jffs2/nodelist.h
++++ b/fs/jffs2/nodelist.h
+@@ -259,7 +259,7 @@ struct jffs2_full_dirent
+ 	uint32_t ino; /* == zero for unlink */
+ 	unsigned int nhash;
+ 	unsigned char type;
+-	unsigned char name[];
++	unsigned char name[] __attribute__((aligned((sizeof(long)))));
+ };
+ 
+ /*