linux-kernel - [PATCH v2 6/7] sched,arch: Remove unused TASK

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Date:   Fri, 11 Jun 2021 10:28:16 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Cc:     Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, Jens Axboe <axboe@...nel.dk>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jason Wessel <jason.wessel@...driver.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        John Stultz <john.stultz@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: [PATCH v2 6/7] sched,arch: Remove unused TASK_STATE offsets

All 6 architectures define TASK_STATE in asm-offsets, but then never
actually use it. Remove the definitions to make sure they never will.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/csky/kernel/asm-offsets.c       |    1 -
 arch/h8300/kernel/asm-offsets.c      |    1 -
 arch/microblaze/kernel/asm-offsets.c |    1 -
 arch/mips/kernel/asm-offsets.c       |    1 -
 arch/openrisc/kernel/asm-offsets.c   |    1 -
 arch/parisc/kernel/asm-offsets.c     |    1 -
 6 files changed, 6 deletions(-)

--- a/arch/csky/kernel/asm-offsets.c
+++ b/arch/csky/kernel/asm-offsets.c
@@ -9,7 +9,6 @@
 int main(void)
 {
 	/* offsets into the task struct */
-	DEFINE(TASK_STATE,        offsetof(struct task_struct, state));
 	DEFINE(TASK_THREAD_INFO,  offsetof(struct task_struct, stack));
 	DEFINE(TASK_FLAGS,        offsetof(struct task_struct, flags));
 	DEFINE(TASK_PTRACE,       offsetof(struct task_struct, ptrace));
--- a/arch/h8300/kernel/asm-offsets.c
+++ b/arch/h8300/kernel/asm-offsets.c
@@ -21,7 +21,6 @@
 int main(void)
 {
 	/* offsets into the task struct */
-	OFFSET(TASK_STATE, task_struct, state);
 	OFFSET(TASK_FLAGS, task_struct, flags);
 	OFFSET(TASK_PTRACE, task_struct, ptrace);
 	OFFSET(TASK_BLOCKED, task_struct, blocked);
--- a/arch/microblaze/kernel/asm-offsets.c
+++ b/arch/microblaze/kernel/asm-offsets.c
@@ -70,7 +70,6 @@ int main(int argc, char *argv[])
 
 	/* struct task_struct */
 	DEFINE(TS_THREAD_INFO, offsetof(struct task_struct, stack));
-	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
 	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -78,7 +78,6 @@ void output_ptreg_defines(void)
 void output_task_defines(void)
 {
 	COMMENT("MIPS task_struct offsets.");
-	OFFSET(TASK_STATE, task_struct, state);
 	OFFSET(TASK_THREAD_INFO, task_struct, stack);
 	OFFSET(TASK_FLAGS, task_struct, flags);
 	OFFSET(TASK_MM, task_struct, mm);
--- a/arch/openrisc/kernel/asm-offsets.c
+++ b/arch/openrisc/kernel/asm-offsets.c
@@ -37,7 +37,6 @@
 int main(void)
 {
 	/* offsets into the task_struct */
-	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
 	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -42,7 +42,6 @@
 int main(void)
 {
 	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
-	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
 	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
 	DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));