[PATCHv3 1/6] lib/string: introduce helper to get base file name from given path

[Andy Shevchenko]

There are several places in the kernel that use functionality like basename(3)
with an exception: in case of '/foo/bar/' we expect to get an empty string.
Let's do it common helper for them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: YAMANE Toshiaki <yamanetoshi@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 include/linux/string.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/string.h b/include/linux/string.h
index 6301258..ac889c5 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -143,4 +143,15 @@ static inline bool strstarts(const char *str, const char *prefix)
 
 extern size_t memweight(const void *ptr, size_t bytes);
 
+/**
+ * kbasename - return the last part of a pathname.
+ *
+ * @path: path to extract the filename from.
+ */
+static inline const char *kbasename(const char *path)
+{
+	const char *tail = strrchr(path, '/');
+	return tail ? tail + 1 : path;
+}
+
 #endif /* _LINUX_STRING_H_ */
-- 
1.7.10.4

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