mm: hwpoison: coredump: support recovery from dump_user_range()

[linux-2.6-block.git] / include / linux / uio.h

diff --git a/include/linux/uio.h b/include/linux/uio.h
index 3d386849a7584906453a43431316990bababd6dd..044c1d8c230cfa2600da3edc10226d39ba287c4b 100644 (file)
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -42,6 +42,7 @@ struct iov_iter_state {
 
 struct iov_iter {
        u8 iter_type;
+       bool copy_mc;
        bool nofault;
        bool data_source;
        bool user_backed;
@@ -256,8 +257,22 @@ size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i);
 
 #ifdef CONFIG_ARCH_HAS_COPY_MC
 size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
+static inline void iov_iter_set_copy_mc(struct iov_iter *i)
+{
+       i->copy_mc = true;
+}
+
+static inline bool iov_iter_is_copy_mc(const struct iov_iter *i)
+{
+       return i->copy_mc;
+}
 #else
 #define _copy_mc_to_iter _copy_to_iter
+static inline void iov_iter_set_copy_mc(struct iov_iter *i) { }
+static inline bool iov_iter_is_copy_mc(const struct iov_iter *i)
+{
+       return false;
+}
 #endif
 
 size_t iov_iter_zero(size_t bytes, struct iov_iter *);
@@ -380,6 +395,7 @@ static inline void iov_iter_ubuf(struct iov_iter *i, unsigned int direction,
        WARN_ON(direction & ~(READ | WRITE));
        *i = (struct iov_iter) {
                .iter_type = ITER_UBUF,
+               .copy_mc = false,
                .user_backed = true,
                .data_source = direction,
                .ubuf = buf,