Commit: 12fd0ea
GitHub URL: https://github.com/SCST-project/scst/commit/12fd0ea93e3164d21aba5e5abe1a2596cacbfd0b
Author: Gleb Chesnokov
Date: 2023-10-10T15:10:02+03:00
Log Message:
-----------
scst/include/backport.h: Backport some debugfs functions
Support the previous commit against kernel versions before v5.0.
See also commit ff9fb72bc077 ("debugfs: return error values,
not NULL") # v5.0.
Modified Paths:
--------------
scst/include/backport.h | 34 +++++++++++++++
1 file changed, 34 insertions(+)
===================================================================
diff --git a/scst/include/backport.h b/scst/include/backport.h
index 9691bdd..56d25e4 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -31,6 +31,7 @@
#include <linux/blk-mq.h>
#endif
#include <linux/bsg-lib.h> /* struct bsg_job */
+#include <linux/debugfs.h>
#include <linux/dmapool.h>
#include <linux/eventpoll.h>
#include <linux/iocontext.h>
@@ -385,6 +386,39 @@ static inline ssize_t debugfs_attr_write(struct file *file,
}
#endif
+/*
+ * See also commit ff9fb72bc077 ("debugfs: return error values,
+ * not NULL") # v5.0.
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
+static inline struct dentry *debugfs_create_dir_backport(const char *name, struct dentry *parent)
+{
+ struct dentry *dentry;
+
+ dentry = debugfs_create_dir(name, parent);
+ if (!dentry)
+ return ERR_PTR(-ENOMEM);
+
+ return dentry;
+}
+
+static inline struct dentry *debugfs_create_file_backport(const char *name, umode_t mode,
+ struct dentry *parent, void *data,
+ const struct file_operations *fops)
+{
+ struct dentry *dentry;
+
+ dentry = debugfs_create_file(name, mode, parent, data, fops);
+ if (!dentry)
+ return ERR_PTR(-ENOMEM);
+
+ return dentry;
+}
+
+#define debugfs_create_dir debugfs_create_dir_backport
+#define debugfs_create_file debugfs_create_file_backport
+#endif
+
/* <linux/device.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
|
