From: Tiwei Bie Date: Fri, 21 Feb 2025 04:18:55 +0000 (+0800) Subject: um: Update min_low_pfn to match changes in uml_reserved X-Git-Tag: v6.14.9~629 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=380f10ee5752ba93f4ace3b86a3b26f8abb1b0c7;p=thirdparty%2Fkernel%2Fstable.git um: Update min_low_pfn to match changes in uml_reserved [ Upstream commit e82cf3051e6193f61e03898f8dba035199064d36 ] When uml_reserved is updated, min_low_pfn must also be updated accordingly. Otherwise, min_low_pfn will not accurately reflect the lowest available PFN. Signed-off-by: Tiwei Bie Link: https://patch.msgid.link/20250221041855.1156109-1-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index befed230aac28..91b7710c0a5f4 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -66,6 +66,7 @@ void __init mem_init(void) map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0); memblock_free((void *)brk_end, uml_reserved - brk_end); uml_reserved = brk_end; + min_low_pfn = PFN_UP(__pa(uml_reserved)); /* this will put all low memory onto the freelists */ memblock_free_all();