diff mbox series

[26/46] powerpc: resrved_mem: Move fdt_init_reserved_mem() below unflatten_device_tree()

Message ID 20240126235425.12233-27-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, 11:54 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/powerpc/kernel/prom.c         | 2 --
 arch/powerpc/kernel/setup-common.c | 3 +++
 2 files changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 5f6307ea3069..3cf8213b114c 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -27,7 +27,6 @@ 
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
-#include <linux/of_reserved_mem.h>
 #include <linux/libfdt.h>
 #include <linux/cpu.h>
 #include <linux/pgtable.h>
@@ -621,7 +620,6 @@  static void __init early_reserve_mem_dt(void)
 
 	early_init_fdt_reserve_self();
 	early_fdt_scan_reserved_mem();
-	fdt_init_reserved_mem();
 
 	dt_root = of_get_flat_dt_root();
 
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 9b142b9d5187..96bd4c964943 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -32,6 +32,7 @@ 
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/of_irq.h>
 #include <linux/hugetlb.h>
 #include <linux/pgtable.h>
@@ -890,6 +891,8 @@  void __init setup_arch(char **cmdline_p)
 	/* Unflatten the device-tree passed by prom_init or kexec */
 	unflatten_device_tree();
 
+	fdt_init_reserved_mem();
+
 	/*
 	 * Initialize cache line/block info from device-tree (on ppc64) or
 	 * just cputable (on ppc32).