Commit f1a54694 authored by Alexander Egorenkov's avatar Alexander Egorenkov Committed by Heiko Carstens
Browse files

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: default avatarAlexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 6bda6670

arch/s390/kernel/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

}