[PATCH v4 5/7] arm64: Unconditionally call unflatten_device_tree()

[Stephen Boyd]

Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a firmware provided or builtin DTB.
When ACPI is in use, unflatten_device_tree() ignores the
'initial_boot_params' pointer so the live DT on those systems won't be
whatever that's pointing to. Similarly, when kexec copies the DT data
the previous kernel to the new one on ACPI systems,
of_kexec_alloc_and_setup_fdt() will ignore the live DT (the empty root
one) and copy the 'initial_boot_params' data.

Cc: Rob Herring <robh+dt at kernel.org>
Cc: Frank Rowand <frowand.list at gmail.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: <linux-arm-kernel at lists.infradead.org>
Signed-off-by: Stephen Boyd <sboyd at kernel.org>
---
 arch/arm64/kernel/setup.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 42c690bb2d60..0d210720d47d 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -351,8 +351,7 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p)
 	/* Parse the ACPI tables for possible boot-time configuration */
 	acpi_boot_table_init();
 
-	if (acpi_disabled)
-		unflatten_device_tree();
+	unflatten_device_tree();
 
 	bootmem_init();
 
-- 
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git