linux-kernel - [PATCH 29/46] xtensa: resrved_mem: Move fdt_init_reserved_mem() below unflatten_device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 26 Jan 2024 15:54:08 -0800
From: Oreoluwa Babatunde <quic_obabatun@...cinc.com>
To: <catalin.marinas@....com>, <will@...nel.org>, <robh+dt@...nel.org>,
        <frowand.list@...il.com>, <vgupta@...nel.org>, <arnd@...db.de>,
        <olof@...om.net>, <soc@...nel.org>, <guoren@...nel.org>,
        <monstr@...str.eu>, <palmer@...belt.com>, <aou@...s.berkeley.edu>,
        <dinguyen@...nel.org>, <chenhuacai@...nel.org>,
        <tsbogend@...ha.franken.de>, <jonas@...thpole.se>,
        <stefan.kristiansson@...nalahti.fi>, <shorne@...il.com>,
        <mpe@...erman.id.au>, <ysato@...rs.sourceforge.jp>, <dalias@...c.org>,
        <glaubitz@...sik.fu-berlin.de>, <richard@....at>,
        <anton.ivanov@...bridgegreys.com>, <johannes@...solutions.net>,
        <chris@...kel.net>, <jcmvbkbc@...il.com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <kernel@...cinc.com>, Oreoluwa Babatunde <quic_obabatun@...cinc.com>
Subject: [PATCH 29/46] xtensa: resrved_mem: Move fdt_init_reserved_mem() below unflatten_device_tree()

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@...cinc.com>
---
 arch/xtensa/kernel/setup.c | 2 ++
 arch/xtensa/mm/init.c      | 2 --
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index bdec4a773af0..cb2fb993de76 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -25,6 +25,7 @@
 #include <linux/cpu.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
+#include <linux/of_reserved_mem.h>
 
 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
 # include <linux/console.h>
@@ -357,6 +358,7 @@ void __init setup_arch(char **cmdline_p)
 	kasan_init();
 	unflatten_and_copy_device_tree();
 
+	fdt_init_reserved_mem();
 #ifdef CONFIG_SMP
 	smp_init_cpus();
 #endif
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index ed3dd5f67b4a..e205a89a2097 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -26,7 +26,6 @@
 #include <linux/nodemask.h>
 #include <linux/mm.h>
 #include <linux/of_fdt.h>
-#include <linux/of_reserved_mem.h>
 #include <linux/dma-map-ops.h>
 
 #include <asm/bootparam.h>
@@ -49,7 +48,6 @@ void __init bootmem_init(void)
 	memblock_reserve(0, PHYS_OFFSET ? PHYS_OFFSET : 1);
 
 	early_fdt_scan_reserved_mem();
-	fdt_init_reserved_mem();
 
 	if (!memblock_phys_mem_size())
 		panic("No memory found!\n");
-- 
2.17.1