microblaze: Fix built-in DTB alignment to be 8-byte aligned

Commit 79edff12060f ("scripts/dtc: Update to upstream version
v1.6.0-51-g183df9e9c2b9") broke booting on Microblaze systems depending on
the build. The problem is libfdt gained an 8-byte starting alignment check,
but the Microblaze built-in DTB area is only 4-byte aligned. This affected
not just built-in DTBs as bootloader passed DTBs are copied into the
built-in DTB region.

Other arches using built-in DTBs use a common linker macro which has
sufficient alignment.

Fixes: 79edff12060f ("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210213011624.251838-1-robh@kernel.org
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index df07b3d..fb31747 100644 (file)
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -45,7 +45,7 @@ SECTIONS {
                _etext = . ;
        }
 
-       . = ALIGN (4) ;
+       . = ALIGN (8) ;
        __fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET) {
                _fdt_start = . ;                /* place for fdt blob */
                *(__fdt_blob) ;                 /* Any link-placed DTB */