From: Oreoluwa Babatunde <quic_obabatun@quicinc.com>
Date: Sat, 10 Feb 2024 00:29:30 +0000 (-0800)
Subject: openrisc: Call setup_memory() earlier in the init sequence
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7b432bf376c9c198a7ff48f1ed14a14c0ffbe1fe;p=linux.git

openrisc: Call setup_memory() earlier in the init sequence

The unflatten_and_copy_device_tree() function contains a call to
memblock_alloc(). This means that memblock is allocating memory before
any of the reserved memory regions are set aside in the setup_memory()
function which calls early_init_fdt_scan_reserved_mem(). Therefore,
there is a possibility for memblock to allocate from any of the
reserved memory regions.

Hence, move the call to setup_memory() to be earlier in the init
sequence so that the reserved memory regions are set aside before any
allocations are done using memblock.

Signed-off-by: Oreoluwa Babatunde <quic_obabatun@quicinc.com>
Signed-off-by: Stafford Horne <shorne@gmail.com>
---

diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index 9cf7fb60441f8..be56eaafc8b95 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -255,6 +255,9 @@ void calibrate_delay(void)
 
 void __init setup_arch(char **cmdline_p)
 {
+	/* setup memblock allocator */
+	setup_memory();
+
 	unflatten_and_copy_device_tree();
 
 	setup_cpuinfo();
@@ -278,9 +281,6 @@ void __init setup_arch(char **cmdline_p)
 	}
 #endif
 
-	/* setup memblock allocator */
-	setup_memory();
-
 	/* paging_init() sets up the MMU and marks all pages as reserved */
 	paging_init();