From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Kosina <jkosina@suse.cz>, Petr Mladek <pmladek@suse.cz>
Subject: [PATCH 18/26 v5] seq_buf: Create seq_buf_used() to find out how much was written
Date: Fri, 14 Nov 2014 23:59:05 -0500 [thread overview]
Message-ID: <20141115050603.696625970@goodmis.org> (raw)
In-Reply-To: 20141115045847.712848224@goodmis.org
[-- Attachment #1: 0018-seq_buf-Create-seq_buf_used-to-find-out-how-much-was.patch --]
[-- Type: text/plain, Size: 1712 bytes --]
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
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
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
include/linux/seq_buf.h | 6 ++++++
kernel/trace/seq_buf.c | 5 +----
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h
index 5d91262433e2..93718e570d4c 100644
--- a/include/linux/seq_buf.h
+++ b/include/linux/seq_buf.h
@@ -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)
diff --git a/kernel/trace/seq_buf.c b/kernel/trace/seq_buf.c
index 7dac34d1235b..9ec5305d9da7 100644
--- a/kernel/trace/seq_buf.c
+++ b/kernel/trace/seq_buf.c
@@ -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);
}
--
2.1.1
next prev parent reply other threads:[~2014-11-15 5:09 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-15 4:58 [PATCH 00/26 v5] trace-seq/seq-buf/x86/printk: Print all stacks from NMI safely Steven Rostedt
2014-11-15 4:58 ` [PATCH 01/26 v5] tracing: Fix trace_seq_bitmask() to start at current position Steven Rostedt
2014-11-15 4:58 ` [PATCH 02/26 v5] tracing: Add trace_seq_has_overflowed() and trace_handle_return() Steven Rostedt
2014-11-15 4:58 ` [PATCH 03/26 v5] blktrace/tracing: Use trace_seq_has_overflowed() helper function Steven Rostedt
2014-11-15 4:58 ` [PATCH 04/26 v5] ring-buffer: Remove check of trace_seq_{puts,printf}() return values Steven Rostedt
2014-11-15 4:58 ` [PATCH 05/26 v5] tracing: Have branch tracer use trace_handle_return() helper function Steven Rostedt
2014-11-15 4:58 ` [PATCH 06/26 v5] tracing: Have function_graph use trace_seq_has_overflowed() Steven Rostedt
2014-11-15 4:58 ` [PATCH 07/26 v5] kprobes/tracing: Use trace_seq_has_overflowed() for overflow checks Steven Rostedt
2014-11-18 14:02 ` Petr Mladek
2014-11-15 4:58 ` [PATCH 08/26 v5] tracing: Do not check return values of trace_seq_p*() for mmio tracer Steven Rostedt
2014-11-18 14:06 ` Petr Mladek
2014-11-15 4:58 ` [PATCH 09/26 v5] tracing/probes: Do not use return value of trace_seq_printf() Steven Rostedt
2014-11-18 14:09 ` Petr Mladek
2014-11-15 4:58 ` [PATCH 10/26 v5] tracing/uprobes: Do not use return values " Steven Rostedt
2014-11-17 5:28 ` Masami Hiramatsu
2014-11-17 5:58 ` Srikar Dronamraju
2014-11-18 14:13 ` Petr Mladek
2014-11-15 4:58 ` [PATCH 11/26 v5] tracing: Do not use return values of trace_seq_printf() in syscall tracing Steven Rostedt
2014-11-15 4:58 ` [PATCH 12/26 v5] tracing: Remove return values of most trace_seq_*() functions Steven Rostedt
2014-11-18 14:18 ` Petr Mladek
2014-11-15 4:59 ` [PATCH 13/26 v5] tracing: Fix return value of ftrace_raw_output_prep() Steven Rostedt
2014-11-18 14:24 ` Petr Mladek
2014-11-15 4:59 ` [PATCH 14/26 v5] tracing: Create seq_buf layer in trace_seq Steven Rostedt
2014-11-19 14:51 ` Petr Mladek
2014-11-19 15:08 ` Steven Rostedt
2014-11-15 4:59 ` [PATCH 15/26 v5] tracing: Convert seq_buf_path() to be like seq_path() Steven Rostedt
2014-11-15 4:59 ` [PATCH 16/26 v5] tracing: Convert seq_buf fields to be like seq_file fields Steven Rostedt
2014-11-15 4:59 ` [PATCH 17/26 v5] tracing: Add a seq_buf_clear() helper and clear len and readpos in init Steven Rostedt
2014-11-15 4:59 ` Steven Rostedt [this message]
2014-11-18 15:02 ` [PATCH 18/26 v5] seq_buf: Create seq_buf_used() to find out how much was written Petr Mladek
2014-11-19 15:49 ` Steven Rostedt
2014-11-19 16:30 ` Petr Mladek
2014-11-15 4:59 ` [PATCH 19/26 v5] tracing: Use trace_seq_used() and seq_buf_used() instead of len Steven Rostedt
2014-11-17 17:32 ` Steven Rostedt
2014-11-17 19:11 ` [PATCH 1/2] tracing: Clean up tracing_fill_pipe_page() Steven Rostedt
2014-11-18 16:15 ` Petr Mladek
2014-11-19 16:17 ` Steven Rostedt
2014-11-19 16:51 ` Petr Mladek
2014-11-19 17:12 ` Steven Rostedt
2014-11-17 19:12 ` [PATCH 2/2] tracing: Use trace_seq_used() and seq_buf_used() instead of len Steven Rostedt
2014-11-18 16:33 ` Petr Mladek
2014-11-18 17:37 ` Steven Rostedt
2014-11-19 11:40 ` Petr Mladek
2014-11-19 13:48 ` Steven Rostedt
2014-11-19 14:40 ` Petr Mladek
2014-11-19 15:01 ` Steven Rostedt
2014-11-19 16:00 ` Steven Rostedt
2014-11-19 16:44 ` Petr Mladek
2014-11-15 4:59 ` [PATCH 20/26 v5] seq_buf: Add seq_buf_can_fit() helper function Steven Rostedt
2014-11-17 17:36 ` Steven Rostedt
2014-11-18 0:07 ` Joe Perches
2014-11-18 0:27 ` Steven Rostedt
2014-11-18 0:35 ` Joe Perches
2014-11-18 0:56 ` Steven Rostedt
2014-11-18 1:07 ` Joe Perches
2014-11-18 1:24 ` Steven Rostedt
2014-11-18 1:48 ` Joe Perches
2014-11-18 2:37 ` Steven Rostedt
2014-11-18 2:50 ` Joe Perches
2014-11-18 3:00 ` Steven Rostedt
2014-11-18 16:40 ` Petr Mladek
2014-11-15 4:59 ` [PATCH 21/26 v5] tracing: Have seq_buf use full buffer Steven Rostedt
2014-11-15 4:59 ` [PATCH 22/26 v5] tracing: Add seq_buf_get_buf() and seq_buf_commit() helper functions Steven Rostedt
2014-11-15 4:59 ` [PATCH 23/26 v5] seq-buf: Make seq_buf_bprintf() conditional on CONFIG_BINARY_PRINTF Steven Rostedt
2014-11-15 4:59 ` [PATCH 24/26 v5] seq_buf: Move the seq_buf code to lib/ Steven Rostedt
2014-11-15 4:59 ` [PATCH 25/26 v5] printk: Add per_cpu printk func to allow printk to be diverted Steven Rostedt
2014-11-15 4:59 ` [PATCH 26/26 v5] x86/nmi: Perform a safe NMI stack trace on all CPUs Steven Rostedt
2014-11-18 17:02 ` Petr Mladek
2014-11-15 5:08 ` [PATCH 00/26 v5] trace-seq/seq-buf/x86/printk: Print all stacks from NMI safely Steven Rostedt
2014-11-18 3:21 ` Steven Rostedt
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