From: Gerald Schaefer Date: Tue, 21 Aug 2012 10:36:34 +0000 (+0200) Subject: s390: enable large page support with CONFIG_DEBUG_PAGEALLOC X-Git-Tag: firefly_0821_release~3680^2~1983^2~72 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=648609e3f24599a5ad8d53df2ec13fbc37810bcc;p=firefly-linux-kernel-4.4.55.git s390: enable large page support with CONFIG_DEBUG_PAGEALLOC So far, large page support was completely disabled with CONFIG_DEBUG_PAGEALLOC, although it would be sufficient if only the large page kernel mapping was disabled. This patch enables large page support with CONFIG_DEBUG_PAGEALLOC, while it prevents the large kernel mapping in that case. Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 83c3271c442b..e48407962b0f 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -267,12 +267,10 @@ static noinline __init void setup_facility_list(void) static noinline __init void setup_hpage(void) { -#ifndef CONFIG_DEBUG_PAGEALLOC if (!test_facility(2) || !test_facility(8)) return; S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE; __ctl_set_bit(0, 23); -#endif } static __init void detect_mvpg(void) diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 6f896e75ab49..c22abf900c9e 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -107,7 +107,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pte = mk_pte_phys(address, __pgprot(ro ? _PAGE_RO : 0)); pm_dir = pmd_offset(pu_dir, address); -#ifdef CONFIG_64BIT +#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC) if (MACHINE_HAS_HPAGE && !(address & ~HPAGE_MASK) && (address + HPAGE_SIZE <= start + size) && (address >= HPAGE_SIZE)) {