seq_buf: Create seq_buf_used() to find out how much was written (eeab9815) · Commits · 戴 / test

Add a helper function seq_buf_used() that replaces the SEQ_BUF_USED() private macro to let callers have a method to know how much of the seq_buf was written to. Link: http://lkml.kernel.org/r/20141114011412.170377300@goodmis.org Link: http://lkml.kernel.org/r/20141114011413.321654244@goodmis.org Reviewed-by:

include/linux/seq_buf.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -64,6 +64,12 @@ seq_buf_buffer_left(struct seq_buf *s)
		return (s->size - 1) - s->len;
		}

		/* How much buffer was written? */
		static inline unsigned int seq_buf_used(struct seq_buf *s)
		{
		return min(s->len, s->size);
		}

		extern __printf(2, 3)
		int seq_buf_printf(struct seq_buf s, const char fmt, ...);
		extern __printf(2, 0)

+1 −4

Original line number	Diff line number	Diff line
		@@ -16,9 +16,6 @@
		#include <linux/seq_file.h>
		#include <linux/seq_buf.h>

		/* How much buffer is written? */
		#define SEQ_BUF_USED(s) min((s)->len, (s)->size - 1)

		/**
		* seq_buf_print_seq - move the contents of seq_buf into a seq_file
		* @m: the seq_file descriptor that is the destination
		@@ -28,7 +25,7 @@
		*/
		int seq_buf_print_seq(struct seq_file m, struct seq_buf s)
		{
		unsigned int len = SEQ_BUF_USED(s);
		unsigned int len = seq_buf_used(s);

		return seq_write(m, s->buffer, len);
		}