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Subject[PATCH 2/2] 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 <>
Signed-off-by: Stephen Boyd <>
drivers/of/fdt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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;


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