From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
linux-arch@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andi Kleen <ak@linux.intel.com>, Peter Anvin <hpa@zytor.com>,
Mike Galbraith <bitbucket@online.de>,
Arjan van de Ven <arjan@linux.intel.com>,
Frederic Weisbecker <fweisbec@gmail.com>
Subject: [patch 0/6] Make all preempt_count related constants generic
Date: Tue, 17 Sep 2013 18:53:04 -0000 [thread overview]
Message-ID: <20130917182350.449685712@linutronix.de> (raw)
In-Reply-To: 20130917082838.218329307@infradead.org
There is no point in having PREEMPT_ACTIVE and HARDIRQ_BITS defined by
an architecture.
The PREEMPT_ACTIVE bit manipulation in the low level entry code is
historical and has been replaced by preempt_schedule_irq().
The HARDIRQ_BITS constant could be 1 in theory because we run all
interrupt handlers with interrupts disabled nowadays. Though we have
some palaeontolical drivers (IDE) which still enable interrupts in the
interrupt handler, so we need to allow at least some limited nesting.
This series converts the remaining low level PREEMPT_ACTIVE users to
utilize preempt_schedule_irq() and moves the PREEMPT_ACTIVE and
HARDIRQ_BITS defines to the core code.
I stumbled over this historical left overs while trying to implement a
lazy interrupt disable scheme (which still has some rough edges due to
completely braindamaged hardware).
Peter, it would be nice if you could pick that up into your
preempt/need_resched series.
Thanks,
tglx
---
arch/alpha/include/asm/thread_info.h | 2 -
arch/arc/include/asm/thread_info.h | 2 -
arch/arm/include/asm/thread_info.h | 6 ----
arch/arm64/include/asm/thread_info.h | 6 ----
arch/avr32/include/asm/thread_info.h | 2 -
arch/blackfin/include/asm/hardirq.h | 3 --
arch/blackfin/include/asm/thread_info.h | 2 -
arch/c6x/include/asm/thread_info.h | 2 -
arch/cris/include/asm/hardirq.h | 12 --------
arch/cris/include/asm/thread_info.h | 2 -
arch/frv/include/asm/thread_info.h | 2 -
arch/h8300/include/asm/hardirq.h | 12 --------
arch/h8300/include/asm/thread_info.h | 2 -
arch/h8300/kernel/entry.S | 6 ----
arch/hexagon/include/asm/thread_info.h | 4 --
arch/ia64/include/asm/thread_info.h | 3 --
arch/ia64/kernel/entry.S | 15 ----------
arch/m32r/include/asm/hardirq.h | 16 -----------
arch/m32r/include/asm/thread_info.h | 2 -
arch/m32r/kernel/entry.S | 8 -----
arch/m68k/include/asm/hardirq.h | 11 --------
arch/m68k/include/asm/thread_info.h | 2 -
arch/metag/include/asm/thread_info.h | 2 -
arch/microblaze/include/asm/thread_info.h | 2 -
arch/mips/include/asm/thread_info.h | 2 -
arch/mn10300/include/asm/thread_info.h | 2 -
arch/parisc/include/asm/thread_info.h | 3 --
arch/powerpc/include/asm/thread_info.h | 2 -
arch/s390/include/asm/hardirq.h | 2 -
arch/s390/include/asm/thread_info.h | 2 -
arch/score/include/asm/thread_info.h | 2 -
arch/sh/include/asm/thread_info.h | 2 -
arch/sh/kernel/entry-common.S | 6 +---
arch/sparc/include/asm/hardirq_32.h | 1
arch/sparc/include/asm/hardirq_64.h | 2 -
arch/sparc/include/asm/thread_info_32.h | 2 -
arch/sparc/include/asm/thread_info_64.h | 2 -
arch/sparc/kernel/rtrap_64.S | 5 ---
arch/tile/include/asm/hardirq.h | 2 -
arch/tile/include/asm/thread_info.h | 2 -
arch/um/include/asm/thread_info.h | 2 -
arch/unicore32/include/asm/thread_info.h | 6 ----
arch/x86/include/asm/thread_info.h | 2 -
arch/xtensa/include/asm/thread_info.h | 2 -
include/linux/preempt_mask.h | 41 ++++++++----------------------
45 files changed, 17 insertions(+), 201 deletions(-)
next prev parent reply other threads:[~2013-09-17 18:53 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-17 9:10 [PATCH 00/11] preempt_count rework -v3 Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 01/11] x86: Use asm goto to implement better modify_and_test() functions Peter Zijlstra
2013-09-18 18:44 ` Linus Torvalds
[not found] ` <4ec87843-c29a-401a-a54f-2cd4d61fba62@email.android.com>
2013-09-19 8:31 ` Andi Kleen
2013-09-19 8:31 ` Andi Kleen
2013-09-19 9:39 ` Ingo Molnar
2013-09-20 4:43 ` H. Peter Anvin
2013-09-17 9:10 ` [PATCH 02/11] sched, rcu: Make RCU use resched_cpu() Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 14:40 ` Peter Zijlstra
2013-09-23 16:55 ` Paul E. McKenney
2013-09-23 21:18 ` Paul E. McKenney
2013-09-24 8:07 ` Peter Zijlstra
2013-09-24 13:37 ` Paul E. McKenney
2013-09-17 9:10 ` [PATCH 03/11] sched: Remove {set,clear}_need_resched Peter Zijlstra
2013-09-17 9:10 ` [PATCH 04/11] sched, idle: Fix the idle polling state logic Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 05/11] sched: Introduce preempt_count accessor functions Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 06/11] sched: Add NEED_RESCHED to the preempt_count Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 07/11] sched, arch: Create asm/preempt.h Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 08/11] sched: Create more preempt_count accessors Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 09/11] sched: Extract the basic add/sub preempt_count modifiers Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 10/11] sched, x86: Provide a per-cpu preempt_count implementation Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 9:10 ` [PATCH 11/11] sched, x86: Optimize the preempt_schedule() call Peter Zijlstra
2013-09-17 9:10 ` Peter Zijlstra
2013-09-17 20:23 ` Peter Zijlstra
2013-09-17 10:53 ` [PATCH 00/11] preempt_count rework -v3 Ingo Molnar
2013-09-17 11:22 ` Peter Zijlstra
2013-09-17 18:53 ` Thomas Gleixner [this message]
2013-09-17 18:53 ` [patch 0/6] Make all preempt_count related constants generic Thomas Gleixner
2013-09-17 18:53 ` [patch 1/6] hardirq: Make hardirq bits generic Thomas Gleixner
2013-09-17 20:00 ` Geert Uytterhoeven
2013-09-17 21:24 ` Thomas Gleixner
2013-09-17 21:24 ` Thomas Gleixner
2013-09-18 14:06 ` Thomas Gleixner
2013-09-18 14:06 ` Thomas Gleixner
2013-09-19 15:14 ` Thomas Gleixner
2013-09-19 15:14 ` Thomas Gleixner
2013-09-19 17:02 ` Andreas Schwab
2013-09-19 18:19 ` Geert Uytterhoeven
2013-09-20 9:26 ` Thomas Gleixner
2013-09-20 9:26 ` Thomas Gleixner
2013-11-04 12:06 ` Thomas Gleixner
2013-11-04 19:44 ` Geert Uytterhoeven
2013-11-04 19:44 ` Geert Uytterhoeven
2013-11-06 17:23 ` Thomas Gleixner
2013-11-06 17:23 ` Thomas Gleixner
2013-11-07 14:12 ` Geert Uytterhoeven
2013-11-07 14:12 ` Geert Uytterhoeven
2013-11-07 16:39 ` Thomas Gleixner
2013-09-17 18:53 ` [patch 2/6] h8300: Use schedule_preempt_irq Thomas Gleixner
2013-09-17 18:53 ` Thomas Gleixner
2013-09-20 17:41 ` Guenter Roeck
2013-09-20 17:41 ` Guenter Roeck
2013-09-20 21:46 ` Thomas Gleixner
2013-09-17 18:53 ` [patch 3/6] m32r: Use preempt_schedule_irq Thomas Gleixner
2013-09-17 18:53 ` Thomas Gleixner
2013-09-17 18:53 ` [patch 5/6] sparc: " Thomas Gleixner
2013-09-17 22:54 ` David Miller
2013-09-17 23:23 ` Thomas Gleixner
2013-09-18 0:12 ` David Miller
2013-09-17 18:53 ` [patch 4/6] ia64: " Thomas Gleixner
2013-11-20 19:59 ` Tony Luck
2013-11-20 20:57 ` Thomas Gleixner
2013-11-21 11:41 ` Thomas Gleixner
2013-11-21 12:39 ` Frederic Weisbecker
2013-11-21 13:06 ` Peter Zijlstra
2013-11-21 13:06 ` Peter Zijlstra
2013-11-21 13:30 ` Thomas Gleixner
2013-11-21 13:30 ` Thomas Gleixner
2013-11-21 18:57 ` Tony Luck
2013-11-21 18:57 ` Tony Luck
2013-11-26 18:37 ` Tony Luck
2013-11-26 18:58 ` Peter Zijlstra
2013-11-26 18:58 ` Peter Zijlstra
2013-11-27 13:36 ` Ingo Molnar
2013-09-17 18:53 ` [patch 6/6] preempt: Make PREEMPT_ACTIVE generic Thomas Gleixner
2013-09-18 10:48 ` Peter Zijlstra
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