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powerpc/mm: Switch some TASK_SIZE checks to use mm_context addr_limit

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Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2017-03-22 09:07:01 +05:30
committed by Michael Ellerman
parent 82228e362f
commit fbfef9027c
4 changed files with 13 additions and 12 deletions
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12
arch/powerpc/mm/mmap.c
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@@ -97,7 +97,7 @@ radix__arch_get_unmapped_area(struct file *filp, unsigned long addr,
struct vm_area_struct *vma;
struct vm_unmapped_area_info info;
if (len > TASK_SIZE - mmap_min_addr)
if (len > mm->context.addr_limit - mmap_min_addr)
return -ENOMEM;
if (flags & MAP_FIXED)
@@ -106,7 +106,7 @@ radix__arch_get_unmapped_area(struct file *filp, unsigned long addr,
if (addr) {
addr = PAGE_ALIGN(addr);
vma = find_vma(mm, addr);
if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
if (mm->context.addr_limit - len >= addr && addr >= mmap_min_addr &&
(!vma || addr + len <= vma->vm_start))
return addr;
}
@@ -114,7 +114,7 @@ radix__arch_get_unmapped_area(struct file *filp, unsigned long addr,
info.flags = 0;
info.length = len;
info.low_limit = mm->mmap_base;
info.high_limit = TASK_SIZE;
info.high_limit = mm->context.addr_limit;
info.align_mask = 0;
return vm_unmapped_area(&info);
}
@@ -132,7 +132,7 @@ radix__arch_get_unmapped_area_topdown(struct file *filp,
struct vm_unmapped_area_info info;
/* requested length too big for entire address space */
if (len > TASK_SIZE - mmap_min_addr)
if (len > mm->context.addr_limit - mmap_min_addr)
return -ENOMEM;
if (flags & MAP_FIXED)
@@ -142,7 +142,7 @@ radix__arch_get_unmapped_area_topdown(struct file *filp,
if (addr) {
addr = PAGE_ALIGN(addr);
vma = find_vma(mm, addr);
if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
if (mm->context.addr_limit - len >= addr && addr >= mmap_min_addr &&
(!vma || addr + len <= vma->vm_start))
return addr;
}
@@ -164,7 +164,7 @@ radix__arch_get_unmapped_area_topdown(struct file *filp,
VM_BUG_ON(addr != -ENOMEM);
info.flags = 0;
info.low_limit = TASK_UNMAPPED_BASE;
info.high_limit = TASK_SIZE;
info.high_limit = mm->context.addr_limit;
addr = vm_unmapped_area(&info);
}