linux-arch.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Keith Packard <keithpac@amazon.com>
To: linux-kernel@vger.kernel.org
Cc: "Abbott Liu" <liuwenliang@huawei.com>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Anshuman Khandual" <anshuman.khandual@arm.com>,
	"Ard Biesheuvel" <ardb@kernel.org>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Ben Segall" <bsegall@google.com>,
	"Bjorn Andersson" <bjorn.andersson@linaro.org>,
	bpf@vger.kernel.org, "Christoph Lameter" <cl@linux.com>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Daniel Bristot de Oliveira" <bristot@redhat.com>,
	"Dennis Zhou" <dennis@kernel.org>,
	devicetree@vger.kernel.org,
	"Dietmar Eggemann" <dietmar.eggemann@arm.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Frank Rowand" <frowand.list@gmail.com>,
	"Geert Uytterhoeven" <geert+renesas@glider.be>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Jason Wang" <jasowang@redhat.com>,
	"Jens Axboe" <axboe@kernel.dk>, "Joe Perches" <joe@perches.com>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"Juri Lelli" <juri.lelli@redhat.com>,
	"Keith Packard" <keithpac@amazon.com>,
	"KP Singh" <kpsingh@kernel.org>,
	kvm@vger.kernel.org, "Linus Walleij" <linus.walleij@linaro.org>,
	linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mm@kvack.org, "Manivannan Sadhasivam" <mani@kernel.org>,
	"Marc Zyngier" <maz@kernel.org>,
	"Martin KaFai Lau" <kafai@fb.com>, "Mel Gorman" <mgorman@suse.de>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Miguel Ojeda" <ojeda@kernel.org>,
	"Mike Rapoport" <rppt@kernel.org>,
	netdev@vger.kernel.org,
	"Nick Desaulniers" <ndesaulniers@google.com>,
	"Nick Desaulniers" <ndesaulniers@gooogle.com>,
	"Nicolas Pitre" <nico@fluxnic.net>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Russell King" <linux@armlinux.org.uk>,
	"Song Liu" <songliubraving@fb.com>,
	"Srikar Dronamraju" <srikar@linux.vnet.ibm.com>,
	"Steven Rostedt" <rostedt@goodmis.org>,
	"Tejun Heo" <tj@kernel.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Valentin Schneider" <valentin.schneider@arm.com>,
	"Vincent Guittot" <vincent.guittot@linaro.org>,
	virtualization@lists.linux-foundation.org,
	"Wolfram Sang (Renesas)" <wsa+renesas@sang-engineering.com>,
	"YiFei Zhu" <yifeifz2@illinois.edu>, "Yonghong Song" <yhs@fb.com>
Subject: [PATCH v4 4/7] Make sure task_struct is available for raw_smp_processor_id
Date: Wed,  8 Sep 2021 12:06:02 -0700	[thread overview]
Message-ID: <20210908190605.419064-5-keithpac@amazon.com> (raw)
In-Reply-To: <20210908190605.419064-1-keithpac@amazon.com>

To allow architectures to use the 'cpu' field in task_struct for cpu
identification, the task_struct must be visible whereever the
raw_smp_processor_id macro is used. It would be simplest to include
linux/sched.h from the relevant asm/smp.h file, but that file is
included from linux/sched.h, and the recursive include ends up with
several declarations in the wrong order.

To avoid this, the PowerPC architecture code has this ugly hack:

	#define raw_smp_processor_id() \
		(*(unsigned int *)((void *)current + _TASK_CPU))

As an alternative, placing includes of linux/sched.h in a few files
that are used along with asm/smp.h means we can use the task_struct
field directly.

Signed-off-by: Keith Packard <keithpac@amazon.com>
---
 arch/arm/mm/proc-v7-bugs.c     | 1 +
 drivers/vhost/vhost.c          | 1 +
 drivers/vhost/vhost.h          | 1 +
 include/asm-generic/irq_regs.h | 1 +
 include/linux/of_address.h     | 1 +
 include/linux/random.h         | 1 +
 include/linux/topology.h       | 1 +
 init/calibrate.c               | 1 +
 kernel/bpf/bpf_lru_list.h      | 1 +
 kernel/bpf/percpu_freelist.h   | 1 +
 kernel/sched/cpuacct.c         | 2 +-
 lib/irq_regs.c                 | 1 +
 12 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index 114c05ab4dd9..9ea078c619a7 100644
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/sched.h>
 #include <linux/arm-smccc.h>
 #include <linux/kernel.h>
 #include <linux/smp.h>
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 5ccb0705beae..e5a073bb5b1e 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -10,6 +10,7 @@
  * Generic code for virtio server in host kernel.
  */
 
+#include <linux/sched.h>
 #include <linux/eventfd.h>
 #include <linux/vhost.h>
 #include <linux/uio.h>
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index b063324c7669..963d08ff2a62 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -2,6 +2,7 @@
 #ifndef _VHOST_H
 #define _VHOST_H
 
+#include <linux/sched.h>
 #include <linux/eventfd.h>
 #include <linux/vhost.h>
 #include <linux/mm.h>
diff --git a/include/asm-generic/irq_regs.h b/include/asm-generic/irq_regs.h
index 2e7c6e89d42e..ab4ca7ab362c 100644
--- a/include/asm-generic/irq_regs.h
+++ b/include/asm-generic/irq_regs.h
@@ -8,6 +8,7 @@
 #ifndef _ASM_GENERIC_IRQ_REGS_H
 #define _ASM_GENERIC_IRQ_REGS_H
 
+#include <linux/sched.h>
 #include <linux/percpu.h>
 
 /*
diff --git a/include/linux/of_address.h b/include/linux/of_address.h
index 88bc943405cd..60c30168d48d 100644
--- a/include/linux/of_address.h
+++ b/include/linux/of_address.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __OF_ADDRESS_H
 #define __OF_ADDRESS_H
+#include <linux/sched.h>
 #include <linux/ioport.h>
 #include <linux/errno.h>
 #include <linux/of.h>
diff --git a/include/linux/random.h b/include/linux/random.h
index f45b8be3e3c4..0accd9277e95 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -7,6 +7,7 @@
 #ifndef _LINUX_RANDOM_H
 #define _LINUX_RANDOM_H
 
+#include <linux/sched.h>
 #include <linux/bug.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 7634cd737061..4bd993bc9513 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -27,6 +27,7 @@
 #ifndef _LINUX_TOPOLOGY_H
 #define _LINUX_TOPOLOGY_H
 
+#include <linux/sched.h>
 #include <linux/arch_topology.h>
 #include <linux/cpumask.h>
 #include <linux/bitops.h>
diff --git a/init/calibrate.c b/init/calibrate.c
index f3831272f113..45002e27e385 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -10,6 +10,7 @@
 #include <linux/init.h>
 #include <linux/timex.h>
 #include <linux/smp.h>
+#include <linux/sched.h>
 #include <linux/percpu.h>
 
 unsigned long lpj_fine;
diff --git a/kernel/bpf/bpf_lru_list.h b/kernel/bpf/bpf_lru_list.h
index 6b12f06ee18c..5aed0c288c76 100644
--- a/kernel/bpf/bpf_lru_list.h
+++ b/kernel/bpf/bpf_lru_list.h
@@ -4,6 +4,7 @@
 #ifndef __BPF_LRU_LIST_H_
 #define __BPF_LRU_LIST_H_
 
+#include <linux/sched.h>
 #include <linux/list.h>
 #include <linux/spinlock_types.h>
 
diff --git a/kernel/bpf/percpu_freelist.h b/kernel/bpf/percpu_freelist.h
index 3c76553cfe57..3bc7a2bbe79b 100644
--- a/kernel/bpf/percpu_freelist.h
+++ b/kernel/bpf/percpu_freelist.h
@@ -3,6 +3,7 @@
  */
 #ifndef __PERCPU_FREELIST_H__
 #define __PERCPU_FREELIST_H__
+#include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/percpu.h>
 
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 104a1bade14f..fb5f52e889a4 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -5,8 +5,8 @@
  * Based on the work by Paul Menage (menage@google.com) and Balbir Singh
  * (balbir@in.ibm.com).
  */
-#include <asm/irq_regs.h>
 #include "sched.h"
+#include <asm/irq_regs.h>
 
 /* Time spent by the tasks of the CPU accounting group executing in ... */
 enum cpuacct_stat_index {
diff --git a/lib/irq_regs.c b/lib/irq_regs.c
index 0d545a93070e..c9d8235f6444 100644
--- a/lib/irq_regs.c
+++ b/lib/irq_regs.c
@@ -5,6 +5,7 @@
  * Written by David Howells (dhowells@redhat.com)
  */
 #include <linux/export.h>
+#include <linux/sched.h>
 #include <linux/percpu.h>
 #include <asm/irq_regs.h>
 
-- 
2.33.0


  parent reply	other threads:[~2021-09-08 19:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <id:20210907220038.91021-1-keithpac@amazon.com>
2021-09-08 19:05 ` [PATCH v4 0/7] ARM: support THREAD_INFO_IN_TASK Keith Packard
2021-09-08 19:05   ` [PATCH v4 1/7] ARM: Pass cpu number to secondary_start_kernel Keith Packard
2021-09-08 19:06   ` [PATCH v4 2/7] ARM: Pass task " Keith Packard
2021-09-08 19:06   ` [PATCH v4 3/7] ARM: Use smp_processor_id() in vfp_pm_suspend instead of ti->cpu Keith Packard
2021-09-08 19:06   ` Keith Packard [this message]
2021-09-10 20:20     ` [PATCH v4 4/7] Make sure task_struct is available for raw_smp_processor_id Rob Herring
2021-09-08 19:06   ` [PATCH v4 5/7] ARM: Stop using TPIDRPRW to hold per_cpu_offset Keith Packard
2021-09-08 19:06   ` [PATCH v4 6/7] ARM: Use TPIDRPRW for current Keith Packard
2021-09-08 19:06   ` [PATCH v4 7/7] ARM: Move thread_info into task_struct (v7 only) Keith Packard

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=20210908190605.419064-5-keithpac@amazon.com \
    --to=keithpac@amazon.com \
    --cc=akpm@linux-foundation.org \
    --cc=andrii@kernel.org \
    --cc=anshuman.khandual@arm.com \
    --cc=ardb@kernel.org \
    --cc=arnd@arndb.de \
    --cc=ast@kernel.org \
    --cc=axboe@kernel.dk \
    --cc=bjorn.andersson@linaro.org \
    --cc=bpf@vger.kernel.org \
    --cc=bristot@redhat.com \
    --cc=bsegall@google.com \
    --cc=cl@linux.com \
    --cc=daniel@iogearbox.net \
    --cc=dennis@kernel.org \
    --cc=devicetree@vger.kernel.org \
    --cc=dietmar.eggemann@arm.com \
    --cc=f.fainelli@gmail.com \
    --cc=frowand.list@gmail.com \
    --cc=geert+renesas@glider.be \
    --cc=jasowang@redhat.com \
    --cc=joe@perches.com \
    --cc=john.fastabend@gmail.com \
    --cc=juri.lelli@redhat.com \
    --cc=kafai@fb.com \
    --cc=kpsingh@kernel.org \
    --cc=kvm@vger.kernel.org \
    --cc=linus.walleij@linaro.org \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux@armlinux.org.uk \
    --cc=liuwenliang@huawei.com \
    --cc=mani@kernel.org \
    --cc=maz@kernel.org \
    --cc=mgorman@suse.de \
    --cc=mingo@redhat.com \
    --cc=mpe@ellerman.id.au \
    --cc=mst@redhat.com \
    --cc=ndesaulniers@google.com \
    --cc=ndesaulniers@gooogle.com \
    --cc=netdev@vger.kernel.org \
    --cc=nico@fluxnic.net \
    --cc=ojeda@kernel.org \
    --cc=peterz@infradead.org \
    --cc=robh+dt@kernel.org \
    --cc=rostedt@goodmis.org \
    --cc=rppt@kernel.org \
    --cc=songliubraving@fb.com \
    --cc=srikar@linux.vnet.ibm.com \
    --cc=tglx@linutronix.de \
    --cc=tj@kernel.org \
    --cc=u.kleine-koenig@pengutronix.de \
    --cc=valentin.schneider@arm.com \
    --cc=vincent.guittot@linaro.org \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=wsa+renesas@sang-engineering.com \
    --cc=yhs@fb.com \
    --cc=yifeifz2@illinois.edu \
    --subject='Re: [PATCH v4 4/7] Make sure task_struct is available for raw_smp_processor_id' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).