Re: [PATCH] of: unmap memory regions in /memreserve node
From: Rob Herring <robh@kernel.org>
Date: 2021-11-30 22:44:03
Also in:
linuxppc-dev, lkml
+linuxppc-dev On Wed, Nov 24, 2021 at 09:33:47PM +0800, Calvin Zhang wrote:
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.
I suspect this has a high chance of breaking some platform. There's no rule a region can't be accessed.
quoted hunk ↗ jump to hunk
Signed-off-by: Calvin Zhang <redacted> --- 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