These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / s390 / mm / mmap.c

diff --git a/kernel/arch/s390/mm/mmap.c b/kernel/arch/s390/mm/mmap.c
index 6e552af..ea01477 100644 (file)
--- a/kernel/arch/s390/mm/mmap.c
+++ b/kernel/arch/s390/mm/mmap.c
@@ -31,9 +31,6 @@
 #include <linux/security.h>
 #include <asm/pgalloc.h>
 
-unsigned long mmap_rnd_mask;
-static unsigned long mmap_align_mask;
-
 static unsigned long stack_maxrandom_size(void)
 {
        if (!(current->flags & PF_RANDOMIZE))
@@ -62,10 +59,7 @@ static inline int mmap_is_legacy(void)
 
 unsigned long arch_mmap_rnd(void)
 {
-       if (is_32bit_task())
-               return (get_random_int() & 0x7ff) << PAGE_SHIFT;
-       else
-               return (get_random_int() & mmap_rnd_mask) << PAGE_SHIFT;
+       return (get_random_int() & MMAP_RND_MASK) << PAGE_SHIFT;
 }
 
 static unsigned long mmap_base_legacy(unsigned long rnd)
@@ -92,7 +86,6 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
        struct mm_struct *mm = current->mm;
        struct vm_area_struct *vma;
        struct vm_unmapped_area_info info;
-       int do_color_align;
 
        if (len > TASK_SIZE - mmap_min_addr)
                return -ENOMEM;
@@ -108,15 +101,14 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
                        return addr;
        }
 
-       do_color_align = 0;
-       if (filp || (flags & MAP_SHARED))
-               do_color_align = !is_32bit_task();
-
        info.flags = 0;
        info.length = len;
        info.low_limit = mm->mmap_base;
        info.high_limit = TASK_SIZE;
-       info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+       if (filp || (flags & MAP_SHARED))
+               info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT;
+       else
+               info.align_mask = 0;
        info.align_offset = pgoff << PAGE_SHIFT;
        return vm_unmapped_area(&info);
 }
@@ -130,7 +122,6 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
        struct mm_struct *mm = current->mm;
        unsigned long addr = addr0;
        struct vm_unmapped_area_info info;
-       int do_color_align;
 
        /* requested length too big for entire address space */
        if (len > TASK_SIZE - mmap_min_addr)
@@ -148,15 +139,14 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
                        return addr;
        }
 
-       do_color_align = 0;
-       if (filp || (flags & MAP_SHARED))
-               do_color_align = !is_32bit_task();
-
        info.flags = VM_UNMAPPED_AREA_TOPDOWN;
        info.length = len;
        info.low_limit = max(PAGE_SIZE, mmap_min_addr);
        info.high_limit = mm->mmap_base;
-       info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+       if (filp || (flags & MAP_SHARED))
+               info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT;
+       else
+               info.align_mask = 0;
        info.align_offset = pgoff << PAGE_SHIFT;
        addr = vm_unmapped_area(&info);
 
@@ -254,35 +244,3 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
                mm->get_unmapped_area = s390_get_unmapped_area_topdown;
        }
 }
-
-static int __init setup_mmap_rnd(void)
-{
-       struct cpuid cpu_id;
-
-       get_cpu_id(&cpu_id);
-       switch (cpu_id.machine) {
-       case 0x9672:
-       case 0x2064:
-       case 0x2066:
-       case 0x2084:
-       case 0x2086:
-       case 0x2094:
-       case 0x2096:
-       case 0x2097:
-       case 0x2098:
-       case 0x2817:
-       case 0x2818:
-       case 0x2827:
-       case 0x2828:
-               mmap_rnd_mask = 0x7ffUL;
-               mmap_align_mask = 0UL;
-               break;
-       case 0x2964:    /* z13 */
-       default:
-               mmap_rnd_mask = 0x3ff80UL;
-               mmap_align_mask = 0x7fUL;
-               break;
-       }
-       return 0;
-}
-early_initcall(setup_mmap_rnd);