Move c_src dirs back to toplevel

[bcachefs-tools-debian] / include / linux / backing-dev.h

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
new file mode 100644 (file)
index 0000000..d8a86b4
--- /dev/null
+++ b/include/linux/backing-dev.h
@@ -0,0 +1,45 @@
+#ifndef _LINUX_BACKING_DEV_H
+#define _LINUX_BACKING_DEV_H
+
+#include <linux/list.h>
+
+typedef int (congested_fn)(void *, int);
+
+enum wb_congested_state {
+       WB_async_congested,     /* The async (write) queue is getting full */
+       WB_sync_congested,      /* The sync queue is getting full */
+};
+
+struct backing_dev_info {
+       struct list_head bdi_list;
+       unsigned        ra_pages;
+       unsigned        capabilities;
+
+       congested_fn    *congested_fn;
+       void            *congested_data;
+};
+
+#define BDI_CAP_NO_ACCT_DIRTY  0x00000001
+#define BDI_CAP_NO_WRITEBACK   0x00000002
+#define BDI_CAP_NO_ACCT_WB     0x00000004
+#define BDI_CAP_STABLE_WRITES  0x00000008
+#define BDI_CAP_STRICTLIMIT    0x00000010
+#define BDI_CAP_CGROUP_WRITEBACK 0x00000020
+
+static inline int bdi_congested(struct backing_dev_info *bdi, int cong_bits)
+{
+       return 0;
+}
+
+static inline int __must_check bdi_setup_and_register(struct backing_dev_info *bdi,
+                                                     char *name)
+{
+       bdi->capabilities = 0;
+       return 0;
+}
+
+static inline void bdi_destroy(struct backing_dev_info *bdi) {}
+
+#define VM_MAX_READAHEAD       128     /* kbytes */
+
+#endif /* _LINUX_BACKING_DEV_H */