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-rw-r--r--lib/seq_buf.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/seq_buf.c b/lib/seq_buf.c
index 0a68f7aa85d6..45c450f423fa 100644
--- a/lib/seq_buf.c
+++ b/lib/seq_buf.c
@@ -93,6 +93,38 @@ int seq_buf_printf(struct seq_buf *s, const char *fmt, ...)
}
EXPORT_SYMBOL_GPL(seq_buf_printf);
+/**
+ * seq_buf_do_printk - printk seq_buf line by line
+ * @s: seq_buf descriptor
+ * @lvl: printk level
+ *
+ * printk()-s a multi-line sequential buffer line by line. The function
+ * makes sure that the buffer in @s is nul terminated and safe to read
+ * as a string.
+ */
+void seq_buf_do_printk(struct seq_buf *s, const char *lvl)
+{
+ const char *start, *lf;
+
+ if (s->size == 0 || s->len == 0)
+ return;
+
+ seq_buf_terminate(s);
+
+ start = s->buffer;
+ while ((lf = strchr(start, '\n'))) {
+ int len = lf - start + 1;
+
+ printk("%s%.*s", lvl, len, start);
+ start = ++lf;
+ }
+
+ /* No trailing LF */
+ if (start < s->buffer + s->len)
+ printk("%s%s\n", lvl, start);
+}
+EXPORT_SYMBOL_GPL(seq_buf_do_printk);
+
#ifdef CONFIG_BINARY_PRINTF
/**
* seq_buf_bprintf - Write the printf string from binary arguments