On 2/5/21 18:35, ira.weiny@intel.com wrote:

+static inline void memmove_page(struct page *dst_page, size_t dst_off,
+			       struct page *src_page, size_t src_off,
+			       size_t len)
+{
+	char *dst = kmap_local_page(dst_page);
+	char *src = kmap_local_page(src_page);
+
+	BUG_ON(dst_off + len > PAGE_SIZE || src_off + len > PAGE_SIZE);
+	memmove(dst + dst_off, src + src_off, len);
+	kunmap_local(src);
+	kunmap_local(dst);
+}
+
+static inline void memcpy_from_page(char *to, struct page *page, size_t offset, size_t len)

How about following ?
static inline void memcpy_from_page(char *to, struct page *page, size_t
offset,
                                    size_t len)  

+{
+	char *from = kmap_local_page(page);
+
+	BUG_ON(offset + len > PAGE_SIZE);
+	memcpy(to, from + offset, len);
+	kunmap_local(from);
+}
+
+static inline void memcpy_to_page(struct page *page, size_t offset, const char *from, size_t len)

How about following ?
static inline void memcpy_to_page(struct page *page, size_t offset,
                                  const char *from, size_t len)

+{
+	char *to = kmap_local_page(page);
+
+	BUG_ON(offset + len > PAGE_SIZE);
+	memcpy(to + offset, from, len);
+	kunmap_local(to);
+}
+
+static inline void memset_page(struct page *page, size_t offset, int val, size_t len)

How about following ?
static inline void memset_page(struct page *page, size_t offset, int val,
                               size_t len)  

+{
+	char *addr = kmap_local_page(page);
+
+	BUG_ON(offset + len > PAGE_SIZE);
+	memset(addr + offset, val, len);
+	kunmap_local(addr);
+}
+