[PATCH 5.15 098/215] openrisc: Call setup_memory() earlier in the init sequence

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oreoluwa Babatunde <quic_obabatun@xxxxxxxxxxx>

[ Upstream commit 7b432bf376c9c198a7ff48f1ed14a14c0ffbe1fe ]

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@xxxxxxxxxxx>
Signed-off-by: Stafford Horne <shorne@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/openrisc/kernel/setup.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index 0cd04d936a7a1..f2fe45d3094df 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -270,6 +270,9 @@ void calibrate_delay(void)
 
 void __init setup_arch(char **cmdline_p)
 {
+	/* setup memblock allocator */
+	setup_memory();
+
 	unflatten_and_copy_device_tree();
 
 	setup_cpuinfo();
@@ -293,9 +296,6 @@ 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();
 
-- 
2.43.0







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