diff options
Diffstat (limited to 'arch/s390/mm/mmap.c')
| -rw-r--r-- | arch/s390/mm/mmap.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index fc9a7dc26c5e..b14fc0887654 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -71,6 +71,15 @@ static inline unsigned long mmap_base(unsigned long rnd, return PAGE_ALIGN(STACK_TOP - gap - rnd); } +static int get_align_mask(struct file *filp, unsigned long flags) +{ + if (!(current->flags & PF_RANDOMIZE)) + return 0; + if (filp || (flags & MAP_SHARED)) + return MMAP_ALIGN_MASK << PAGE_SHIFT; + return 0; +} + unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) @@ -97,10 +106,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, info.length = len; info.low_limit = mm->mmap_base; info.high_limit = TASK_SIZE; - if (filp || (flags & MAP_SHARED)) - info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT; - else - info.align_mask = 0; + info.align_mask = get_align_mask(filp, flags); info.align_offset = pgoff << PAGE_SHIFT; addr = vm_unmapped_area(&info); if (offset_in_page(addr)) @@ -138,10 +144,7 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long ad info.length = len; info.low_limit = PAGE_SIZE; info.high_limit = mm->mmap_base; - if (filp || (flags & MAP_SHARED)) - info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT; - else - info.align_mask = 0; + info.align_mask = get_align_mask(filp, flags); info.align_offset = pgoff << PAGE_SHIFT; addr = vm_unmapped_area(&info); |