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Thu, 8 Feb 2024 20:15:49 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B353320067; Thu, 8 Feb 2024 20:15:49 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A387A2004E; Thu, 8 Feb 2024 20:15:49 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTPS; Thu, 8 Feb 2024 20:15:49 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55669) id 7A994E04F6; Thu, 8 Feb 2024 21:15:49 +0100 (CET) From: Alexander Gordeev To: Frederic Weisbecker , Ingo Molnar , Michael Ellerman , Nicholas Piggin , Heiko Carstens , Vasily Gorbik Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 2/5] sched/vtime: get rid of generic vtime_task_switch() implementation Date: Thu, 8 Feb 2024 21:15:46 +0100 Message-Id: <2baebb95af9772959a0d85d0bd789afdfd2baf94.1707422448.git.agordeev@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: PlIw3QKyaiuYG22CXmb6OvN3ZwwFV-aQ X-Proofpoint-ORIG-GUID: gSkOW2J9oJlvbBFr27bzSoglDUh76aQk X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-08_08,2024-02-08_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=617 adultscore=0 spamscore=0 suspectscore=0 clxscore=1015 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402080108 Content-Type: text/plain; charset="utf-8" The generic vtime_task_switch() implementation gets built only if __ARCH_HAS_VTIME_TASK_SWITCH is not defined, but requires an architecture to implement arch_vtime_task_switch() callback at the same time, which is confusing. Further, arch_vtime_task_switch() is implemented for 32-bit PowerPC architecture only and vtime_task_switch() generic variant is rather superfluous. Simplify the whole vtime_task_switch() wiring by moving the existing generic implementation to PowerPC. Reviewed-by: Frederic Weisbecker Signed-off-by: Alexander Gordeev Reviewed-by: Nicholas Piggin --- arch/powerpc/include/asm/cputime.h | 13 ------------- arch/powerpc/kernel/time.c | 22 ++++++++++++++++++++++ kernel/sched/cputime.c | 13 ------------- 3 files changed, 22 insertions(+), 26 deletions(-) diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/= cputime.h index 4961fb38e438..aff858ca99c0 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -32,23 +32,10 @@ #ifdef CONFIG_PPC64 #define get_accounting(tsk) (&get_paca()->accounting) #define raw_get_accounting(tsk) (&local_paca->accounting) -static inline void arch_vtime_task_switch(struct task_struct *tsk) { } =20 #else #define get_accounting(tsk) (&task_thread_info(tsk)->accounting) #define raw_get_accounting(tsk) get_accounting(tsk) -/* - * Called from the context switch with interrupts disabled, to charge all - * accumulated times to the current process, and to prepare accounting on - * the next process. - */ -static inline void arch_vtime_task_switch(struct task_struct *prev) -{ - struct cpu_accounting_data *acct =3D get_accounting(current); - struct cpu_accounting_data *acct0 =3D get_accounting(prev); - - acct->starttime =3D acct0->starttime; -} #endif =20 /* diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index df20cf201f74..c0fdc6d94fee 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -354,6 +354,28 @@ void vtime_flush(struct task_struct *tsk) acct->hardirq_time =3D 0; acct->softirq_time =3D 0; } + +/* + * Called from the context switch with interrupts disabled, to charge all + * accumulated times to the current process, and to prepare accounting on + * the next process. + */ +void vtime_task_switch(struct task_struct *prev) +{ + if (is_idle_task(prev)) + vtime_account_idle(prev); + else + vtime_account_kernel(prev); + + vtime_flush(prev); + + if (!IS_ENABLED(CONFIG_PPC64)) { + struct cpu_accounting_data *acct =3D get_accounting(current); + struct cpu_accounting_data *acct0 =3D get_accounting(prev); + + acct->starttime =3D acct0->starttime; + } +} #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ =20 void __no_kcsan __delay(unsigned long loops) diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index af7952f12e6c..aa48b2ec879d 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -424,19 +424,6 @@ static inline void irqtime_account_process_tick(struct= task_struct *p, int user_ */ #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE =20 -# ifndef __ARCH_HAS_VTIME_TASK_SWITCH -void vtime_task_switch(struct task_struct *prev) -{ - if (is_idle_task(prev)) - vtime_account_idle(prev); - else - vtime_account_kernel(prev); - - vtime_flush(prev); - arch_vtime_task_switch(prev); -} -# endif - void vtime_account_irq(struct task_struct *tsk, unsigned int offset) { unsigned int pc =3D irq_count() - offset; --=20 2.40.1