From f1a5469474312939686ffdbcbf521a1cb78eac81 Mon Sep 17 00:00:00 2001 From: Alexander Egorenkov Date: Wed, 16 Jun 2021 14:10:03 +0200 Subject: [PATCH] s390/setup: don't reserve memory that occupied decompressor's head There is no useful information within [STARTUP_NORMAL_OFFSET, HEAD_END] now. But the memory region [0, STARTUP_NORMAL_OFFSET] is used by: * lowcore * kdump for swapping memory * stand-alone zipl dumpers for code, data, stack and heap Signed-off-by: Alexander Egorenkov Acked-by: Heiko Carstens Signed-off-by: Heiko Carstens --- arch/s390/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 32d1324..c5bbf96 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -797,7 +797,7 @@ static void __init reserve_kernel(void) { unsigned long start_pfn = PFN_UP(__pa(_end)); - memblock_reserve(0, HEAD_END); + memblock_reserve(0, STARTUP_NORMAL_OFFSET); memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn) - (unsigned long)_stext); } -- 2.7.4