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[19/46] ARC: resrved_mem: Move fdt_init_reserved_mem() below unflatten_device_tree()

Message ID 20240126235425.12233-20-quic_obabatun@quicinc.com (mailing list archive)
State Not Applicable
Headers show
Series Dynamic allocation of reserved_mem array. | expand

Commit Message

Oreoluwa Babatunde Jan. 26, 2024, 11:53 p.m. UTC 
The unflattened devicetree structure is available to be used not long
after the page tables have been set up on most architectures, and is
available even before that on other architectures.

Hence, move the call to fdt_init_reserved_mem() to after
unflatten_device_tree() is called so that the reserved memory nodes can
be accessed using the unflattened device tree APIs.

Using the unflattened devicetree APIs is more efficient than using the
flattened devicetree APIs.

Signed-off-by: Oreoluwa Babatunde <quic_obabatun@quicinc.com>
---
 arch/arc/kernel/setup.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 44f00e8e16cd..c5e3c4abb249 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -524,11 +524,10 @@  void __init setup_arch(char **cmdline_p)
 	setup_processor();
 	setup_arch_memory();
 
-	fdt_init_reserved_mem();
-
 	/* copy flat DT out of .init and then unflatten it */
 	unflatten_and_copy_device_tree();
 
+	fdt_init_reserved_mem();
 	/* Can be issue if someone passes cmd line arg "ro"
 	 * But that is unlikely so keeping it as it is
 	 */