From 514211f542dd6eb877adf46d400ce351c81d95ad Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Tue, 12 Jun 2018 16:46:59 +0200 Subject: [PATCH] s390/setup: do not reserve the decompressor code Introduce PARMAREA_END, and use it for memblock reserve of low memory, which is used for lowcore, kdump data mover code and page buffer, early stack and parmarea. There is no need to reserve an area between PARMAREA_END and the decompressor _ehead. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/setup.h | 1 + arch/s390/kernel/setup.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 9c30ebe046f3..be02f0558048 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -11,6 +11,7 @@ #define PARMAREA 0x10400 +#define PARMAREA_END 0x11000 /* * Machine features detected in early.c diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index d82a9ec64ea9..c637c12f9e37 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -674,12 +674,12 @@ static void __init reserve_kernel(void) #ifdef CONFIG_DMA_API_DEBUG /* * DMA_API_DEBUG code stumbles over addresses from the - * range [_ehead, _stext]. Mark the memory as reserved + * range [PARMAREA_END, _stext]. Mark the memory as reserved * so it is not used for CONFIG_DMA_API_DEBUG=y. */ memblock_reserve(0, PFN_PHYS(start_pfn)); #else - memblock_reserve(0, (unsigned long)_ehead); + memblock_reserve(0, PARMAREA_END); memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn) - (unsigned long)_stext); #endif -- 2.30.2