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-rw-r--r--include/linux/mm.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7cb17c6b97de..b892e95d4929 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2327,6 +2327,17 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
#define FOLL_REMOTE 0x2000 /* we are working on non-current tsk/mm */
#define FOLL_COW 0x4000 /* internal GUP flag */
+static inline int vm_fault_to_errno(int vm_fault, int foll_flags)
+{
+ if (vm_fault & VM_FAULT_OOM)
+ return -ENOMEM;
+ if (vm_fault & (VM_FAULT_HWPOISON | VM_FAULT_HWPOISON_LARGE))
+ return (foll_flags & FOLL_HWPOISON) ? -EHWPOISON : -EFAULT;
+ if (vm_fault & (VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV))
+ return -EFAULT;
+ return 0;
+}
+
typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
void *data);
extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,