linux-kernel - [PATCH] fdt: Properly handle "no-map" field in the memory region

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Date:   Fri, 12 Jul 2019 10:31:24 +0200
From:   KarimAllah Ahmed <karahmed@...zon.de>
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     KarimAllah Ahmed <karahmed@...zon.de>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Subject: [PATCH] fdt: Properly handle "no-map" field in the memory region

Mark the memory region with NOMAP flag instead of completely removing it
from the memory blocks. That makes the FDT handling consistent with the EFI
memory map handling.

Cc: Rob Herring <robh+dt@...nel.org>
Cc: Frank Rowand <frowand.list@...il.com>
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: KarimAllah Ahmed <karahmed@...zon.de>
---
 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 de893c9..77982ae 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1175,7 +1175,7 @@ int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
 					phys_addr_t size, bool nomap)
 {
 	if (nomap)
-		return memblock_remove(base, size);
+		return memblock_mark_nomap(base, size);
 	return memblock_reserve(base, size);
 }
 
-- 
2.7.4