From: Guan Xuetao <gxt@mprc.pku.edu.cn>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Mundt <lethal@linux-sh.org>
Subject: Re: [patch 10/11] sh/unicore32/irqs: Do not trace arch_local_{*,irq_*} functions
Date: Mon, 04 Jul 2011 09:56:39 +0800 [thread overview]
Message-ID: <1309744599.2291.1.camel@epip-laptop> (raw)
In-Reply-To: <20110702033854.432833160@goodmis.org>
It looks good to me.
Thanks & Regards.
Guan Xuetao
On Fri, 2011-07-01 at 23:04 -0400, Steven Rostedt wrote:
> plain text document attachment
> (0010-sh-unicore32-irqs-Do-not-trace-arch_local_-irq_-func.patch)
> From: Steven Rostedt <srostedt@redhat.com>
>
> Do not trace arch_local_save_flags(), arch_local_irq_*() and friends.
> Although they are marked inline, gcc may still make a function out of
> them and add it to the pool of functions that are traced by the function
> tracer. This can cause undesirable results (kernel panic, triple faults,
> etc).
>
> Add the notrace notation to prevent them from ever being traced.
>
> This patch only updates include/asm-generic/irqflags.h, but the only archs
> to use it is superH and unicore32.
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Paul Mundt <lethal@linux-sh.org>
> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
> ---
> include/asm-generic/irqflags.h | 12 +++++++-----
> 1 files changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/include/asm-generic/irqflags.h b/include/asm-generic/irqflags.h
> index 1f40d002..092b27e 100644
> --- a/include/asm-generic/irqflags.h
> +++ b/include/asm-generic/irqflags.h
> @@ -1,6 +1,8 @@
> #ifndef __ASM_GENERIC_IRQFLAGS_H
> #define __ASM_GENERIC_IRQFLAGS_H
>
> +#include <linux/types.h>
> +
> /*
> * All architectures should implement at least the first two functions,
> * usually inline assembly will be the best way.
> @@ -22,7 +24,7 @@ void arch_local_irq_restore(unsigned long flags);
>
> /* get status and disable interrupts */
> #ifndef arch_local_irq_save
> -static inline unsigned long arch_local_irq_save(void)
> +static inline notrace unsigned long arch_local_irq_save(void)
> {
> unsigned long flags;
> flags = arch_local_save_flags();
> @@ -33,7 +35,7 @@ static inline unsigned long arch_local_irq_save(void)
>
> /* test flags */
> #ifndef arch_irqs_disabled_flags
> -static inline int arch_irqs_disabled_flags(unsigned long flags)
> +static inline notrace int arch_irqs_disabled_flags(unsigned long flags)
> {
> return flags == ARCH_IRQ_DISABLED;
> }
> @@ -41,7 +43,7 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
>
> /* unconditionally enable interrupts */
> #ifndef arch_local_irq_enable
> -static inline void arch_local_irq_enable(void)
> +static inline notrace void arch_local_irq_enable(void)
> {
> arch_local_irq_restore(ARCH_IRQ_ENABLED);
> }
> @@ -49,7 +51,7 @@ static inline void arch_local_irq_enable(void)
>
> /* unconditionally disable interrupts */
> #ifndef arch_local_irq_disable
> -static inline void arch_local_irq_disable(void)
> +static inline notrace void arch_local_irq_disable(void)
> {
> arch_local_irq_restore(ARCH_IRQ_DISABLED);
> }
> @@ -57,7 +59,7 @@ static inline void arch_local_irq_disable(void)
>
> /* test hardware interrupt enable bit */
> #ifndef arch_irqs_disabled
> -static inline int arch_irqs_disabled(void)
> +static inline notrace int arch_irqs_disabled(void)
> {
> return arch_irqs_disabled_flags(arch_local_save_flags());
> }
next prev parent reply other threads:[~2011-07-04 1:58 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20110702030435.308336775@goodmis.org>
2011-07-02 3:04 ` [patch 01/11] x86/irqs: Do not trace arch_local_{*,irq_*} functions Steven Rostedt
2011-07-07 0:51 ` Steven Rostedt
2011-07-07 21:43 ` [tip:perf/core] tracing, x86/irq: Do not trace arch_local_{*,irq_*}() functions tip-bot for Steven Rostedt
2011-07-02 3:04 ` [patch 02/11] arm/irqs: Do not trace arch_local_{*,irq_*} functions Steven Rostedt
2011-07-02 3:04 ` [patch 03/11] blackfin/irqs: " Steven Rostedt
2011-07-02 6:50 ` Mike Frysinger
2011-07-02 16:11 ` Steven Rostedt
2011-07-02 16:39 ` Mike Frysinger
2011-07-02 16:40 ` Mike Frysinger
2011-07-05 12:51 ` Steven Rostedt
2011-07-05 16:20 ` Mike Frysinger
2011-07-05 19:07 ` Mike Frysinger
2011-07-05 19:13 ` Steven Rostedt
2011-07-05 19:25 ` Mike Frysinger
2011-07-02 3:04 ` [patch 04/11] ia64/irqs: " Steven Rostedt
2011-07-02 3:04 ` [patch 05/11] microblaze/irqs: " Steven Rostedt
2011-07-05 10:43 ` Michal Simek
2011-07-05 12:49 ` Steven Rostedt
2011-07-02 3:04 ` [patch 06/11] mips/irqs: " Steven Rostedt
2011-07-02 3:04 ` [patch 07/11] parisc/irqs: " Steven Rostedt
2011-07-02 3:04 ` [patch 08/11] powerpc/irqs: " Steven Rostedt
2011-07-02 3:04 ` [patch 09/11] s390/irqs: " Steven Rostedt
2011-07-04 8:10 ` Martin Schwidefsky
2011-07-05 12:49 ` Steven Rostedt
2011-07-02 3:04 ` [patch 10/11] sh/unicore32/irqs: " Steven Rostedt
2011-07-04 1:56 ` Guan Xuetao [this message]
2011-07-05 12:50 ` Steven Rostedt
2011-07-11 3:34 ` Paul Mundt
2011-07-13 1:36 ` Steven Rostedt
2011-07-02 3:04 ` [patch 11/11] sparc/irqs: " Steven Rostedt
2011-07-02 4:11 ` David Miller
2011-07-05 12:49 ` Steven Rostedt
2011-07-06 6:43 ` David Miller
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