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Subject[tip:perf/core] perf machine: Simplify accessing the host machine
Commit-ID:  34ba5122bf198c9cdfcbecc9b23eaa414244a3f6
Gitweb: http://git.kernel.org/tip/34ba5122bf198c9cdfcbecc9b23eaa414244a3f6
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Wed, 19 Dec 2012 09:04:24 -0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 24 Jan 2013 16:40:13 -0300

perf machine: Simplify accessing the host machine

It is always there, no sense in calling a function named
"perf_session__find_host_machine".

Also no sense in checking if that function return is NULL, so ditch
needless error handling.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-a6a3zx3afbrxo8p2zqm5mxo8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-kmem.c | 7 +------
tools/perf/builtin-record.c | 7 +------
tools/perf/builtin-top.c | 4 ++--
tools/perf/util/session.c | 2 +-
tools/perf/util/session.h | 6 ------
5 files changed, 5 insertions(+), 21 deletions(-)

diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 0b4b796..9fddca7 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -340,7 +340,7 @@ static void __print_result(struct rb_root *root, struct perf_session *session,
int n_lines, int is_caller)
{
struct rb_node *next;
- struct machine *machine;
+ struct machine *machine = &session->machines.host;

printf("%.102s\n", graph_dotted_line);
printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
@@ -349,11 +349,6 @@ static void __print_result(struct rb_root *root, struct perf_session *session,

next = rb_first(root);

- machine = perf_session__find_host_machine(session);
- if (!machine) {
- pr_err("__print_result: couldn't find kernel information\n");
- return;
- }
while (next && n_lines--) {
struct alloc_stat *data = rb_entry(next, struct alloc_stat,
node);
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index a0b2427..2ac690c 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -512,12 +512,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)

rec->post_processing_offset = lseek(output, 0, SEEK_CUR);

- machine = perf_session__find_host_machine(session);
- if (!machine) {
- pr_err("Couldn't find native kernel information.\n");
- err = -1;
- goto out_delete_session;
- }
+ machine = &session->machines.host;

if (opts->pipe_output) {
err = perf_event__synthesize_attrs(tool, session,
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index e0ecebd..bc78812 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -847,13 +847,13 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
++top->us_samples;
if (top->hide_user_symbols)
continue;
- machine = perf_session__find_host_machine(session);
+ machine = &session->machines.host;
break;
case PERF_RECORD_MISC_KERNEL:
++top->kernel_samples;
if (top->hide_kernel_symbols)
continue;
- machine = perf_session__find_host_machine(session);
+ machine = &session->machines.host;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
++top->guest_kernel_samples;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 046b057..bd85280b 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -821,7 +821,7 @@ static struct machine *
return perf_session__findnew_machine(session, pid);
}

- return perf_session__find_host_machine(session);
+ return &session->machines.host;
}

static int perf_session_deliver_event(struct perf_session *session,
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index de4e687..b5c0847 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -75,12 +75,6 @@ void perf_session__set_id_hdr_size(struct perf_session *session);
void perf_session__remove_thread(struct perf_session *self, struct thread *th);

static inline
-struct machine *perf_session__find_host_machine(struct perf_session *self)
-{
- return &self->machines.host;
-}
-
-static inline
struct machine *perf_session__find_machine(struct perf_session *self, pid_t pid)
{
return machines__find(&self->machines, pid);

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