[PATCH v5 8/9] arm64: kdump: Remove custom linux,usable-memory-range handling

From: Geert Uytterhoeven
Date: Wed Aug 11 2021 - 04:52:08 EST


Remove the architecture-specific code for handling the
"linux,usable-memory-range" property under the "/chosen" node in DT, as
the platform-agnostic FDT core code already takes care of this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
v5:
- Remove all handling, not just parsing,

v4:
- New.
---
arch/arm64/mm/init.c | 35 -----------------------------------
1 file changed, 35 deletions(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index bac4f06bb7d900a2..4e90a1d170587376 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -197,45 +197,10 @@ static int __init early_mem(char *p)
}
early_param("mem", early_mem);

-static int __init early_init_dt_scan_usablemem(unsigned long node,
- const char *uname, int depth, void *data)
-{
- struct memblock_region *usablemem = data;
- const __be32 *reg;
- int len;
-
- if (depth != 1 || strcmp(uname, "chosen") != 0)
- return 0;
-
- reg = of_get_flat_dt_prop(node, "linux,usable-memory-range", &len);
- if (!reg || (len < (dt_root_addr_cells + dt_root_size_cells)))
- return 1;
-
- usablemem->base = dt_mem_next_cell(dt_root_addr_cells, &reg);
- usablemem->size = dt_mem_next_cell(dt_root_size_cells, &reg);
-
- return 1;
-}
-
-static void __init fdt_enforce_memory_region(void)
-{
- struct memblock_region reg = {
- .size = 0,
- };
-
- of_scan_flat_dt(early_init_dt_scan_usablemem, &reg);
-
- if (reg.size)
- memblock_cap_memory_range(reg.base, reg.size);
-}
-
void __init arm64_memblock_init(void)
{
const s64 linear_region_size = PAGE_END - _PAGE_OFFSET(vabits_actual);

- /* Handle linux,usable-memory-range property */
- fdt_enforce_memory_region();
-
/* Remove memory above our supported physical address size */
memblock_remove(1ULL << PHYS_MASK_SHIFT, ULLONG_MAX);

--
2.25.1