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-rw-r--r--include/linux/kfifo.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 7ad6d32dd67..c8618243ca5 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -116,6 +116,16 @@ extern __must_check unsigned int kfifo_out(struct kfifo *fifo,
extern __must_check unsigned int kfifo_out_peek(struct kfifo *fifo,
void *to, unsigned int len, unsigned offset);
+/**
+ * kfifo_initialized - Check if kfifo is initialized.
+ * @fifo: fifo to check
+ * Return %true if FIFO is initialized, otherwise %false.
+ * Assumes the fifo was 0 before.
+ */
+static inline bool kfifo_initialized(struct kfifo *fifo)
+{
+ return fifo->buffer != 0;
+}
/**
* kfifo_reset - removes the entire FIFO contents