All of lore.kernel.org
 help / color / mirror / Atom feed
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH] powerpc/perf: Convert fsl_emb notifier to state machine callbacks
Date: Fri, 18 Aug 2023 10:59:44 +0200	[thread overview]
Message-ID: <603e1facb32608f88f40b7d7b9094adc50e7b2dc.1692349125.git.christophe.leroy@csgroup.eu> (raw)

  CC      arch/powerpc/perf/core-fsl-emb.o
arch/powerpc/perf/core-fsl-emb.c:675:6: error: no previous prototype for 'hw_perf_event_setup' [-Werror=missing-prototypes]
  675 | void hw_perf_event_setup(int cpu)
      |      ^~~~~~~~~~~~~~~~~~~

Looks like fsl_emb was completely missed by commit 3f6da3905398 ("perf:
Rework and fix the arch CPU-hotplug hooks")

So, apply same changes as commit 3f6da3905398 ("perf: Rework and fix
the arch CPU-hotplug hooks") then commit 57ecde42cc74 ("powerpc/perf:
Convert book3s notifier to state machine callbacks")

While at it, also fix following error:

arch/powerpc/perf/core-fsl-emb.c: In function 'perf_event_interrupt':
arch/powerpc/perf/core-fsl-emb.c:648:13: error: variable 'found' set but not used [-Werror=unused-but-set-variable]
  648 |         int found = 0;
      |             ^~~~~

Fixes: 3f6da3905398 ("perf: Rework and fix the arch CPU-hotplug hooks")
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Arnd Bergmann <arnd@arndb.de>
---
 arch/powerpc/perf/core-fsl-emb.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/perf/core-fsl-emb.c b/arch/powerpc/perf/core-fsl-emb.c
index ee721f420a7b..1a53ab08447c 100644
--- a/arch/powerpc/perf/core-fsl-emb.c
+++ b/arch/powerpc/perf/core-fsl-emb.c
@@ -645,7 +645,6 @@ static void perf_event_interrupt(struct pt_regs *regs)
 	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
 	struct perf_event *event;
 	unsigned long val;
-	int found = 0;
 
 	for (i = 0; i < ppmu->n_counter; ++i) {
 		event = cpuhw->event[i];
@@ -654,7 +653,6 @@ static void perf_event_interrupt(struct pt_regs *regs)
 		if ((int)val < 0) {
 			if (event) {
 				/* event has overflowed */
-				found = 1;
 				record_and_restart(event, val, regs);
 			} else {
 				/*
@@ -672,11 +670,13 @@ static void perf_event_interrupt(struct pt_regs *regs)
 	isync();
 }
 
-void hw_perf_event_setup(int cpu)
+static int fsl_emb_pmu_prepare_cpu(unsigned int cpu)
 {
 	struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
 
 	memset(cpuhw, 0, sizeof(*cpuhw));
+
+	return 0;
 }
 
 int register_fsl_emb_pmu(struct fsl_emb_pmu *pmu)
@@ -689,6 +689,8 @@ int register_fsl_emb_pmu(struct fsl_emb_pmu *pmu)
 		pmu->name);
 
 	perf_pmu_register(&fsl_emb_pmu, "cpu", PERF_TYPE_RAW);
+	cpuhp_setup_state(CPUHP_PERF_POWER, "perf/powerpc:prepare",
+			  fsl_emb_pmu_prepare_cpu, NULL);
 
 	return 0;
 }
-- 
2.41.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/perf: Convert fsl_emb notifier to state machine callbacks
Date: Fri, 18 Aug 2023 10:59:44 +0200	[thread overview]
Message-ID: <603e1facb32608f88f40b7d7b9094adc50e7b2dc.1692349125.git.christophe.leroy@csgroup.eu> (raw)

  CC      arch/powerpc/perf/core-fsl-emb.o
arch/powerpc/perf/core-fsl-emb.c:675:6: error: no previous prototype for 'hw_perf_event_setup' [-Werror=missing-prototypes]
  675 | void hw_perf_event_setup(int cpu)
      |      ^~~~~~~~~~~~~~~~~~~

Looks like fsl_emb was completely missed by commit 3f6da3905398 ("perf:
Rework and fix the arch CPU-hotplug hooks")

So, apply same changes as commit 3f6da3905398 ("perf: Rework and fix
the arch CPU-hotplug hooks") then commit 57ecde42cc74 ("powerpc/perf:
Convert book3s notifier to state machine callbacks")

While at it, also fix following error:

arch/powerpc/perf/core-fsl-emb.c: In function 'perf_event_interrupt':
arch/powerpc/perf/core-fsl-emb.c:648:13: error: variable 'found' set but not used [-Werror=unused-but-set-variable]
  648 |         int found = 0;
      |             ^~~~~

Fixes: 3f6da3905398 ("perf: Rework and fix the arch CPU-hotplug hooks")
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Arnd Bergmann <arnd@arndb.de>
---
 arch/powerpc/perf/core-fsl-emb.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/perf/core-fsl-emb.c b/arch/powerpc/perf/core-fsl-emb.c
index ee721f420a7b..1a53ab08447c 100644
--- a/arch/powerpc/perf/core-fsl-emb.c
+++ b/arch/powerpc/perf/core-fsl-emb.c
@@ -645,7 +645,6 @@ static void perf_event_interrupt(struct pt_regs *regs)
 	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
 	struct perf_event *event;
 	unsigned long val;
-	int found = 0;
 
 	for (i = 0; i < ppmu->n_counter; ++i) {
 		event = cpuhw->event[i];
@@ -654,7 +653,6 @@ static void perf_event_interrupt(struct pt_regs *regs)
 		if ((int)val < 0) {
 			if (event) {
 				/* event has overflowed */
-				found = 1;
 				record_and_restart(event, val, regs);
 			} else {
 				/*
@@ -672,11 +670,13 @@ static void perf_event_interrupt(struct pt_regs *regs)
 	isync();
 }
 
-void hw_perf_event_setup(int cpu)
+static int fsl_emb_pmu_prepare_cpu(unsigned int cpu)
 {
 	struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
 
 	memset(cpuhw, 0, sizeof(*cpuhw));
+
+	return 0;
 }
 
 int register_fsl_emb_pmu(struct fsl_emb_pmu *pmu)
@@ -689,6 +689,8 @@ int register_fsl_emb_pmu(struct fsl_emb_pmu *pmu)
 		pmu->name);
 
 	perf_pmu_register(&fsl_emb_pmu, "cpu", PERF_TYPE_RAW);
+	cpuhp_setup_state(CPUHP_PERF_POWER, "perf/powerpc:prepare",
+			  fsl_emb_pmu_prepare_cpu, NULL);
 
 	return 0;
 }
-- 
2.41.0


             reply	other threads:[~2023-08-18  9:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-18  8:59 Christophe Leroy [this message]
2023-08-18  8:59 ` [PATCH] powerpc/perf: Convert fsl_emb notifier to state machine callbacks Christophe Leroy
2023-08-22  5:18 ` Christophe Leroy
2023-08-22  5:18   ` Christophe Leroy
2023-08-23 11:55 ` Michael Ellerman
2023-08-23 11:55   ` Michael Ellerman

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=603e1facb32608f88f40b7d7b9094adc50e7b2dc.1692349125.git.christophe.leroy@csgroup.eu \
    --to=christophe.leroy@csgroup.eu \
    --cc=arnd@arndb.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mpe@ellerman.id.au \
    --cc=npiggin@gmail.com \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.