From: Stephen Boyd <swboyd@chromium.org>
Date: Tue, 14 May 2019 20:40:53 +0000 (-0700)
Subject: of/fdt: Mark initial_boot_params as __ro_after_init
X-Git-Tag: v5.3-rc1~122^2~51
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7c71650f9a3640464dd907bd7a6510cc7ea02ba6;p=linux.git

of/fdt: Mark initial_boot_params as __ro_after_init

The FDT pointer, i.e. initial_boot_params, shouldn't be changed after
init. It's only set by boot code and then the only user of the FDT is
the raw sysfs reading API. Mark this pointer with __ro_after_init so
that the pointer can't be changed after init.

Cc: Hsin-Yi Wang <hsinyi@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Herring <robh@kernel.org>
---

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 918098c9f72a..3d36b5afd9bd 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -516,7 +516,7 @@ EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree);
 int __initdata dt_root_addr_cells;
 int __initdata dt_root_size_cells;
 
-void *initial_boot_params;
+void *initial_boot_params __ro_after_init;
 
 #ifdef CONFIG_OF_EARLY_FLATTREE