From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Jiri Olsa <jolsa@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: [for-next][PATCH 04/11] tracing: Iterate trace_[ku]probe objects directly
Date: Sat, 11 Dec 2021 20:26:21 -0500 [thread overview]
Message-ID: <20211212012645.307872958@goodmis.org> (raw)
In-Reply-To: <20211212012617.690710310@goodmis.org>
From: Jiri Olsa <jolsa@redhat.com>
As suggested by Linus [1] using list_for_each_entry to iterate
directly trace_[ku]probe objects so we can skip another call to
container_of in these loops.
[1] https://lore.kernel.org/r/CAHk-=wjakjw6-rDzDDBsuMoDCqd+9ogifR_EE1F0K-jYek1CdA@mail.gmail.com
Link: https://lkml.kernel.org/r/20211125202852.406405-1-jolsa@kernel.org
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace_kprobe.c | 13 ++++---------
kernel/trace/trace_uprobe.c | 23 ++++++++---------------
2 files changed, 12 insertions(+), 24 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index d10c01948e68..f8c26ee72de3 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -327,11 +327,9 @@ static inline int __enable_trace_kprobe(struct trace_kprobe *tk)
static void __disable_trace_kprobe(struct trace_probe *tp)
{
- struct trace_probe *pos;
struct trace_kprobe *tk;
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tk = container_of(pos, struct trace_kprobe, tp);
+ list_for_each_entry(tk, trace_probe_probe_list(tp), tp.list) {
if (!trace_kprobe_is_registered(tk))
continue;
if (trace_kprobe_is_return(tk))
@@ -348,7 +346,7 @@ static void __disable_trace_kprobe(struct trace_probe *tp)
static int enable_trace_kprobe(struct trace_event_call *call,
struct trace_event_file *file)
{
- struct trace_probe *pos, *tp;
+ struct trace_probe *tp;
struct trace_kprobe *tk;
bool enabled;
int ret = 0;
@@ -369,8 +367,7 @@ static int enable_trace_kprobe(struct trace_event_call *call,
if (enabled)
return 0;
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tk = container_of(pos, struct trace_kprobe, tp);
+ list_for_each_entry(tk, trace_probe_probe_list(tp), tp.list) {
if (trace_kprobe_has_gone(tk))
continue;
ret = __enable_trace_kprobe(tk);
@@ -559,11 +556,9 @@ static bool trace_kprobe_has_same_kprobe(struct trace_kprobe *orig,
struct trace_kprobe *comp)
{
struct trace_probe_event *tpe = orig->tp.event;
- struct trace_probe *pos;
int i;
- list_for_each_entry(pos, &tpe->probes, list) {
- orig = container_of(pos, struct trace_kprobe, tp);
+ list_for_each_entry(orig, &tpe->probes, tp.list) {
if (strcmp(trace_kprobe_symbol(orig),
trace_kprobe_symbol(comp)) ||
trace_kprobe_offset(orig) != trace_kprobe_offset(comp))
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index a4d5c624fe79..3bd09d612137 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -409,12 +409,10 @@ static bool trace_uprobe_has_same_uprobe(struct trace_uprobe *orig,
struct trace_uprobe *comp)
{
struct trace_probe_event *tpe = orig->tp.event;
- struct trace_probe *pos;
struct inode *comp_inode = d_real_inode(comp->path.dentry);
int i;
- list_for_each_entry(pos, &tpe->probes, list) {
- orig = container_of(pos, struct trace_uprobe, tp);
+ list_for_each_entry(orig, &tpe->probes, tp.list) {
if (comp_inode != d_real_inode(orig->path.dentry) ||
comp->offset != orig->offset)
continue;
@@ -1072,14 +1070,12 @@ static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)
static void __probe_event_disable(struct trace_probe *tp)
{
- struct trace_probe *pos;
struct trace_uprobe *tu;
tu = container_of(tp, struct trace_uprobe, tp);
WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tu = container_of(pos, struct trace_uprobe, tp);
+ list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
if (!tu->inode)
continue;
@@ -1091,7 +1087,7 @@ static void __probe_event_disable(struct trace_probe *tp)
static int probe_event_enable(struct trace_event_call *call,
struct trace_event_file *file, filter_func_t filter)
{
- struct trace_probe *pos, *tp;
+ struct trace_probe *tp;
struct trace_uprobe *tu;
bool enabled;
int ret;
@@ -1126,8 +1122,7 @@ static int probe_event_enable(struct trace_event_call *call,
if (ret)
goto err_flags;
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tu = container_of(pos, struct trace_uprobe, tp);
+ list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
ret = trace_uprobe_enable(tu, filter);
if (ret) {
__probe_event_disable(tp);
@@ -1272,7 +1267,7 @@ static bool trace_uprobe_filter_add(struct trace_uprobe_filter *filter,
static int uprobe_perf_close(struct trace_event_call *call,
struct perf_event *event)
{
- struct trace_probe *pos, *tp;
+ struct trace_probe *tp;
struct trace_uprobe *tu;
int ret = 0;
@@ -1284,8 +1279,7 @@ static int uprobe_perf_close(struct trace_event_call *call,
if (trace_uprobe_filter_remove(tu->tp.event->filter, event))
return 0;
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tu = container_of(pos, struct trace_uprobe, tp);
+ list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
ret = uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);
if (ret)
break;
@@ -1297,7 +1291,7 @@ static int uprobe_perf_close(struct trace_event_call *call,
static int uprobe_perf_open(struct trace_event_call *call,
struct perf_event *event)
{
- struct trace_probe *pos, *tp;
+ struct trace_probe *tp;
struct trace_uprobe *tu;
int err = 0;
@@ -1309,8 +1303,7 @@ static int uprobe_perf_open(struct trace_event_call *call,
if (trace_uprobe_filter_add(tu->tp.event->filter, event))
return 0;
- list_for_each_entry(pos, trace_probe_probe_list(tp), list) {
- tu = container_of(pos, struct trace_uprobe, tp);
+ list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);
if (err) {
uprobe_perf_close(call, event);
--
2.33.0
next prev parent reply other threads:[~2021-12-12 1:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-12 1:26 [for-next][PATCH 00/11] tracing: More updates for 5.17 Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 01/11] tracing: Make trace_marker{,_raw} stream-like Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 02/11] script/sorttable: Code style improvements Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 03/11] tracefs: Use d_inode() helper function to get the dentry inode Steven Rostedt
2021-12-12 1:26 ` Steven Rostedt [this message]
2021-12-12 1:26 ` [for-next][PATCH 05/11] tracing: Do not let synth_events block other dyn_event systems during create Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 06/11] tracing: Use memset_startat helper in trace_iterator_reset() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 07/11] tracing: Use trace_iterator_reset() in tracing_read_pipe() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 08/11] tracing: Change event_command func() to parse() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 09/11] tracing: Change event_trigger_ops func() to trigger() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 10/11] tracing: Add helper functions to simplify event_command.parse() callback handling Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 11/11] tracing: Have existing event_command.parse() implementations use helpers Steven Rostedt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211212012645.307872958@goodmis.org \
--to=rostedt@goodmis.org \
--cc=akpm@linux-foundation.org \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mhiramat@kernel.org \
--cc=mingo@kernel.org \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®