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| author | Takashi Iwai <tiwai@suse.de> | 2012-01-31 18:13:14 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-01-31 18:13:14 +0400 |
| commit | ea51e5040e24eefe44d70bc654a237ca1f0225b0 (patch) | |
| tree | df2e5922dcdfafae62a10d8cd97f98121064fc23 /arch/s390/mm/init.c | |
| parent | 3422a47041b8cb8f14ac1e3926bcf711121df6dc (diff) | |
| parent | 8dbd52daee38adaae4d5a674bcca837e694a4f4c (diff) | |
| download | linux-ea51e5040e24eefe44d70bc654a237ca1f0225b0.tar.xz | |
Merge branch 'fix/asoc' into for-linus
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index d4b9fb4d0042..5d633019d8f3 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -93,18 +93,22 @@ static unsigned long setup_zero_pages(void) void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; - unsigned long pgd_type; + unsigned long pgd_type, asce_bits; init_mm.pgd = swapper_pg_dir; - S390_lowcore.kernel_asce = __pa(init_mm.pgd) & PAGE_MASK; #ifdef CONFIG_64BIT - /* A three level page table (4TB) is enough for the kernel space. */ - S390_lowcore.kernel_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; - pgd_type = _REGION3_ENTRY_EMPTY; + if (VMALLOC_END > (1UL << 42)) { + asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; + pgd_type = _REGION2_ENTRY_EMPTY; + } else { + asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; + pgd_type = _REGION3_ENTRY_EMPTY; + } #else - S390_lowcore.kernel_asce |= _ASCE_TABLE_LENGTH; + asce_bits = _ASCE_TABLE_LENGTH; pgd_type = _SEGMENT_ENTRY_EMPTY; #endif + S390_lowcore.kernel_asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits; clear_table((unsigned long *) init_mm.pgd, pgd_type, sizeof(unsigned long)*2048); vmem_map_init(); |