diff options
| author | Gerald Schaefer | 2012-08-21 12:36:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky | 2012-09-26 15:44:50 +0200 |
| commit | 648609e3f24599a5ad8d53df2ec13fbc37810bcc (patch) | |
| tree | bd8a7694f53ab33a8c85cf52313905fa4f59454e | |
| parent | s390/string: provide asm lib functions for memcpy and memcmp (diff) | |
| download | kernel-qcow2-linux-648609e3f24599a5ad8d53df2ec13fbc37810bcc.tar.gz kernel-qcow2-linux-648609e3f24599a5ad8d53df2ec13fbc37810bcc.tar.xz kernel-qcow2-linux-648609e3f24599a5ad8d53df2ec13fbc37810bcc.zip | |
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 <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/early.c | 2 | ||||
| -rw-r--r-- | arch/s390/mm/vmem.c | 2 |
2 files changed, 1 insertions, 3 deletions
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)) { |