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| author |   Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2016-07-04 14:47:01 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-07-06 08:46:43 +0200 |
| commit | d08de8e2d86744f91d9d5d57c56ca2b6e33bf6ec (patch) | |
| tree | 2bcf0bcb5ec30e48eb82fbc7e3a216cab8671f04 /arch/s390/mm/gmap.c | |
| parent | s390: have unique symbol for __switch_to address (diff) | |
| download | linux-dev-d08de8e2d86744f91d9d5d57c56ca2b6e33bf6ec.tar.xz linux-dev-d08de8e2d86744f91d9d5d57c56ca2b6e33bf6ec.zip | |
s390/mm: add support for 2GB hugepages
This adds support for 2GB hugetlbfs pages on s390.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/gmap.c')
| -rw-r--r-- | arch/s390/mm/gmap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index cace818d86eb..69466f6055c2 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -430,6 +430,9 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr) VM_BUG_ON(pgd_none(*pgd)); pud = pud_offset(pgd, vmaddr); VM_BUG_ON(pud_none(*pud)); + /* large puds cannot yet be handled */ + if (pud_large(*pud)) + return -EFAULT; pmd = pmd_offset(pud, vmaddr); VM_BUG_ON(pmd_none(*pmd)); /* large pmds cannot yet be handled */ |