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authorDavid S. Miller <davem@davemloft.net>2016-03-19 21:05:24 -0400
committerDavid S. Miller <davem@davemloft.net>2016-03-19 21:05:24 -0400
commitc78a85a8430e35aecd53e190a2f6b999062b1037 (patch)
treefbd69827579db437492fb77b5faa53814114bed3 /include/linux/mm_types.h
parent133800d1f0288b9ddfc0d0aded10d9efa82d5b8c (diff)
parentde06dbfa7861c9019eedefc0c356ba86e5098f1b (diff)
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Diffstat (limited to 'include/linux/mm_types.h')
-rw-r--r--include/linux/mm_types.h22
1 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 624b78b848b8..944b2b37313b 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -566,10 +566,26 @@ static inline void clear_tlb_flush_pending(struct mm_struct *mm)
}
#endif
-struct vm_special_mapping
-{
- const char *name;
+struct vm_fault;
+
+struct vm_special_mapping {
+ const char *name; /* The name, e.g. "[vdso]". */
+
+ /*
+ * If .fault is not provided, this points to a
+ * NULL-terminated array of pages that back the special mapping.
+ *
+ * This must not be NULL unless .fault is provided.
+ */
struct page **pages;
+
+ /*
+ * If non-NULL, then this is called to resolve page faults
+ * on the special mapping. If used, .pages is not checked.
+ */
+ int (*fault)(const struct vm_special_mapping *sm,
+ struct vm_area_struct *vma,
+ struct vm_fault *vmf);
};
enum tlb_flush_reason {