Move c_src dirs back to toplevel

[bcachefs-tools-debian] / include / linux / page.h

diff --git a/include/linux/page.h b/include/linux/page.h
new file mode 100644 (file)
index 0000000..111e5e6
--- /dev/null
+++ b/include/linux/page.h
@@ -0,0 +1,38 @@
+#ifndef _LINUX_PAGE_H
+#define _LINUX_PAGE_H
+
+#include <sys/user.h>
+
+struct page;
+
+#ifndef PAGE_SIZE
+
+#define PAGE_SIZE   4096UL
+#define PAGE_MASK   (~(PAGE_SIZE - 1))
+
+#endif
+
+#ifndef PAGE_SHIFT
+#define PAGE_SHIFT 12
+#endif
+
+
+#define virt_to_page(p)                                                        \
+       ((struct page *) (((unsigned long) (p)) & PAGE_MASK))
+#define offset_in_page(p)              ((unsigned long) (p) & ~PAGE_MASK)
+
+#define page_address(p)                        ((void *) (p))
+
+#define kmap_atomic(page)              page_address(page)
+#define kunmap_atomic(addr)            do {} while (0)
+
+#define kmap_local_page(page)          page_address(page)
+#define kunmap_local(addr)             do {} while (0)
+
+#define PageHighMem(page)              false
+
+static const char zero_page[PAGE_SIZE];
+
+#define ZERO_PAGE(o)                   ((struct page *) &zero_page[0])
+
+#endif /* _LINUX_PAGE_H */