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cpuset,mempolicy: fix sleeping function called from invalid context
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
mm
/
memory.c
diff --git
a/mm/memory.c
b/mm/memory.c
index
be6a0c0
..
2121d8b
100644
(file)
--- a/
mm/memory.c
+++ b/
mm/memory.c
@@
-1929,12
+1929,17
@@
int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
unsigned long address, unsigned int fault_flags)
{
struct vm_area_struct *vma;
unsigned long address, unsigned int fault_flags)
{
struct vm_area_struct *vma;
+ vm_flags_t vm_flags;
int ret;
vma = find_extend_vma(mm, address);
if (!vma || address < vma->vm_start)
return -EFAULT;
int ret;
vma = find_extend_vma(mm, address);
if (!vma || address < vma->vm_start)
return -EFAULT;
+ vm_flags = (fault_flags & FAULT_FLAG_WRITE) ? VM_WRITE : VM_READ;
+ if (!(vm_flags & vma->vm_flags))
+ return -EFAULT;
+
ret = handle_mm_fault(mm, vma, address, fault_flags);
if (ret & VM_FAULT_ERROR) {
if (ret & VM_FAULT_OOM)
ret = handle_mm_fault(mm, vma, address, fault_flags);
if (ret & VM_FAULT_ERROR) {
if (ret & VM_FAULT_OOM)
@@
-3348,6
+3353,7
@@
static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
if (ret & VM_FAULT_LOCKED)
unlock_page(vmf.page);
ret = VM_FAULT_HWPOISON;
if (ret & VM_FAULT_LOCKED)
unlock_page(vmf.page);
ret = VM_FAULT_HWPOISON;
+ page_cache_release(vmf.page);
goto uncharge_out;
}
goto uncharge_out;
}
@@
-3703,7
+3709,6
@@
static int __handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma,
if (unlikely(is_vm_hugetlb_page(vma)))
return hugetlb_fault(mm, vma, address, flags);
if (unlikely(is_vm_hugetlb_page(vma)))
return hugetlb_fault(mm, vma, address, flags);
-retry:
pgd = pgd_offset(mm, address);
pud = pud_alloc(mm, pgd, address);
if (!pud)
pgd = pgd_offset(mm, address);
pud = pud_alloc(mm, pgd, address);
if (!pud)
@@
-3741,26
+3746,16
@@
retry:
if (dirty && !pmd_write(orig_pmd)) {
ret = do_huge_pmd_wp_page(mm, vma, address, pmd,
orig_pmd);
if (dirty && !pmd_write(orig_pmd)) {
ret = do_huge_pmd_wp_page(mm, vma, address, pmd,
orig_pmd);
- /*
- * If COW results in an oom, the huge pmd will
- * have been split, so retry the fault on the
- * pte for a smaller charge.
- */
- if (unlikely(ret & VM_FAULT_OOM))
- goto retry;
- return ret;
+ if (!(ret & VM_FAULT_FALLBACK))
+ return ret;
} else {
huge_pmd_set_accessed(mm, vma, address, pmd,
orig_pmd, dirty);
} else {
huge_pmd_set_accessed(mm, vma, address, pmd,
orig_pmd, dirty);
+ return 0;
}
}
-
- return 0;
}
}
}
}
- /* THP should already have been handled */
- BUG_ON(pmd_numa(*pmd));
-
/*
* Use __pte_alloc instead of pte_alloc_map, because we can't
* run pte_offset_map on the pmd, if an huge pmd could
/*
* Use __pte_alloc instead of pte_alloc_map, because we can't
* run pte_offset_map on the pmd, if an huge pmd could