From: Peng Fan <peng.fan@xxxxxxx> Subject: memblock: check memory total_size mem=[X][G|M] is broken on ARM64 platform, there are cases that even type.cnt is 1, but total_size is not 0 because regions are merged into 1. So only check 'cnt' is not enough, total_size should be used, othersize bootargs 'mem=[X][G|B]' not work anymore. Link: https://lkml.kernel.org/r/20210930024437.32598-1-peng.fan@xxxxxxxxxxx Fixes: e888fa7bb882 ("memblock: Check memory add/cap ordering") Signed-off-by: Peng Fan <peng.fan@xxxxxxx> Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memblock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memblock.c~memblock-check-memory-total_size +++ a/mm/memblock.c @@ -1692,7 +1692,7 @@ void __init memblock_cap_memory_range(ph if (!size) return; - if (memblock.memory.cnt <= 1) { + if (!memblock_memory->total_size) { pr_warn("%s: No memory registered yet\n", __func__); return; } _
