When a memory offset is specified through the commandline, add the
memory in range PHYS_OFFSET:Y as reserved memory area.
Otherwise the bootmem allocator is initialised with low page equal to
min_low_pfn = PHYS_OFFSET, and in free_all_bootmem will process pages
starting from min_low_pfn instead of PFN(Y).
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@xxxxxxxxxx>
---
arch/mips/kernel/setup.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index c22f0fd..ae88866 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -662,6 +662,10 @@ static int __init early_parse_mem(char *p)
start = memparse(p + 1, &p);
add_memory_region(start, size, BOOT_MEM_RAM);
+
+ if (start && start > PHYS_OFFSET)
+ add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET,
+ BOOT_MEM_RESERVED);
return 0;
}
early_param("mem", early_parse_mem);
--
2.7.4
