linux-kernel - [PATCH] of: unmap memory regions in /memreserve node

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Message-Id: <20211124133347.3861391-1-calvinzhang.cool@gmail.com>
Date:   Wed, 24 Nov 2021 21:33:47 +0800
From:   Calvin Zhang <calvinzhang.cool@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Calvin Zhang <calvinzhang.cool@...il.com>
Subject: [PATCH] of: unmap memory regions in /memreserve node

Reserved memory regions in /memreserve node aren't and shouldn't
be referenced elsewhere. So mark them no-map to skip direct mapping
for them.

Signed-off-by: Calvin Zhang <calvinzhang.cool@...il.com>
---
 drivers/of/fdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index bdca35284ceb..9e88cc8445f6 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -638,7 +638,7 @@ void __init early_init_fdt_scan_reserved_mem(void)
 		fdt_get_mem_rsv(initial_boot_params, n, &base, &size);
 		if (!size)
 			break;
-		early_init_dt_reserve_memory_arch(base, size, false);
+		early_init_dt_reserve_memory_arch(base, size, true);
 	}
 
 	fdt_scan_reserved_mem();
-- 
2.30.2