From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
prasanna@in.ibm.com, anil.s.keshavamurthy@intel.com,
davem@davemloft.net
Subject: Re: [patch 1/8] Kprobes - do not use kprobes mutex in arch code
Date: Tue, 17 Jul 2007 11:08:03 +0530 [thread overview]
Message-ID: <20070717053803.GA7033@in.ibm.com> (raw)
In-Reply-To: <20070714012411.262873138@polymtl.ca>
On Fri, Jul 13, 2007 at 09:21:34PM -0400, Mathieu Desnoyers wrote:
> Remove the kprobes mutex from kprobes.h, since it does not belong there. Also
> remove all use of this mutex in the architecture specific code, replacing it by
> a proper mutex lock/unlock in the architecture agnostic code.
>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Thanks Mathieu.
> CC: prasanna@in.ibm.com
> CC: ananth@in.ibm.com
> CC: anil.s.keshavamurthy@intel.com
> CC: davem@davemloft.net
> ---
> arch/i386/kernel/kprobes.c | 2 --
> arch/ia64/kernel/kprobes.c | 2 --
> arch/powerpc/kernel/kprobes.c | 2 --
> arch/s390/kernel/kprobes.c | 2 --
> arch/x86_64/kernel/kprobes.c | 2 --
> include/linux/kprobes.h | 2 --
> kernel/kprobes.c | 2 ++
> 7 files changed, 2 insertions(+), 12 deletions(-)
>
> Index: linux-2.6-lttng/include/linux/kprobes.h
> ===================================================================
> --- linux-2.6-lttng.orig/include/linux/kprobes.h 2007-07-13 18:42:08.000000000 -0400
> +++ linux-2.6-lttng/include/linux/kprobes.h 2007-07-13 18:42:52.000000000 -0400
> @@ -35,7 +35,6 @@
> #include <linux/percpu.h>
> #include <linux/spinlock.h>
> #include <linux/rcupdate.h>
> -#include <linux/mutex.h>
>
> #ifdef CONFIG_KPROBES
> #include <asm/kprobes.h>
> @@ -177,7 +176,6 @@
> }
>
> extern spinlock_t kretprobe_lock;
> -extern struct mutex kprobe_mutex;
> extern int arch_prepare_kprobe(struct kprobe *p);
> extern void arch_arm_kprobe(struct kprobe *p);
> extern void arch_disarm_kprobe(struct kprobe *p);
> Index: linux-2.6-lttng/arch/i386/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/arch/i386/kernel/kprobes.c 2007-07-13 18:42:08.000000000 -0400
> +++ linux-2.6-lttng/arch/i386/kernel/kprobes.c 2007-07-13 18:42:52.000000000 -0400
> @@ -209,9 +209,7 @@
>
> void __kprobes arch_remove_kprobe(struct kprobe *p)
> {
> - mutex_lock(&kprobe_mutex);
> free_insn_slot(p->ainsn.insn, (p->ainsn.boostable == 1));
> - mutex_unlock(&kprobe_mutex);
> }
>
> static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
> Index: linux-2.6-lttng/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/kernel/kprobes.c 2007-07-13 18:42:10.000000000 -0400
> +++ linux-2.6-lttng/kernel/kprobes.c 2007-07-13 18:43:17.000000000 -0400
> @@ -641,7 +641,9 @@
> list_del_rcu(&p->list);
> kfree(old_p);
> }
> + mutex_lock(&kprobe_mutex);
> arch_remove_kprobe(p);
> + mutex_unlock(&kprobe_mutex);
> } else {
> mutex_lock(&kprobe_mutex);
> if (p->break_handler)
> Index: linux-2.6-lttng/arch/ia64/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/arch/ia64/kernel/kprobes.c 2007-07-13 18:43:59.000000000 -0400
> +++ linux-2.6-lttng/arch/ia64/kernel/kprobes.c 2007-07-13 18:44:03.000000000 -0400
> @@ -565,9 +565,7 @@
>
> void __kprobes arch_remove_kprobe(struct kprobe *p)
> {
> - mutex_lock(&kprobe_mutex);
> free_insn_slot(p->ainsn.insn, 0);
> - mutex_unlock(&kprobe_mutex);
> }
> /*
> * We are resuming execution after a single step fault, so the pt_regs
> Index: linux-2.6-lttng/arch/powerpc/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/arch/powerpc/kernel/kprobes.c 2007-07-13 18:44:20.000000000 -0400
> +++ linux-2.6-lttng/arch/powerpc/kernel/kprobes.c 2007-07-13 18:44:26.000000000 -0400
> @@ -86,9 +86,7 @@
>
> void __kprobes arch_remove_kprobe(struct kprobe *p)
> {
> - mutex_lock(&kprobe_mutex);
> free_insn_slot(p->ainsn.insn, 0);
> - mutex_unlock(&kprobe_mutex);
> }
>
> static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
> Index: linux-2.6-lttng/arch/s390/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/arch/s390/kernel/kprobes.c 2007-07-13 18:44:43.000000000 -0400
> +++ linux-2.6-lttng/arch/s390/kernel/kprobes.c 2007-07-13 18:44:46.000000000 -0400
> @@ -218,9 +218,7 @@
>
> void __kprobes arch_remove_kprobe(struct kprobe *p)
> {
> - mutex_lock(&kprobe_mutex);
> free_insn_slot(p->ainsn.insn, 0);
> - mutex_unlock(&kprobe_mutex);
> }
>
> static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
> Index: linux-2.6-lttng/arch/x86_64/kernel/kprobes.c
> ===================================================================
> --- linux-2.6-lttng.orig/arch/x86_64/kernel/kprobes.c 2007-07-13 18:45:08.000000000 -0400
> +++ linux-2.6-lttng/arch/x86_64/kernel/kprobes.c 2007-07-13 18:45:14.000000000 -0400
> @@ -249,9 +249,7 @@
>
> void __kprobes arch_remove_kprobe(struct kprobe *p)
> {
> - mutex_lock(&kprobe_mutex);
> free_insn_slot(p->ainsn.insn, 0);
> - mutex_unlock(&kprobe_mutex);
> }
>
> static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
>
> --
> Mathieu Desnoyers
> Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
> OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2007-07-17 5:36 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-14 1:21 [patch 0/8] Text Edit Lock Mathieu Desnoyers
2007-07-14 1:21 ` [patch 1/8] Kprobes - do not use kprobes mutex in arch code Mathieu Desnoyers
2007-07-14 10:49 ` Christoph Hellwig
2007-07-14 19:20 ` Mathieu Desnoyers
2007-07-16 10:27 ` Ananth N Mavinakayanahalli
2007-07-16 15:12 ` Mathieu Desnoyers
2007-07-14 19:30 ` Mathieu Desnoyers
2007-07-14 19:51 ` [PATCH] Kprobes - use a mutex to protect the instruction pages list Mathieu Desnoyers
2007-07-17 5:38 ` Ananth N Mavinakayanahalli
2007-07-14 19:52 ` [PATCH] Kprobes - Declare kprobe_mutex static Mathieu Desnoyers
2007-07-17 5:39 ` Ananth N Mavinakayanahalli
2007-07-17 5:38 ` Ananth N Mavinakayanahalli [this message]
2007-07-14 1:21 ` [patch 2/8] Text Edit Lock - Architecture Independent Code Mathieu Desnoyers
2007-07-14 22:55 ` [PATCH] Immediate Values - Architecture Independent Code - Fixes following HCH comments Mathieu Desnoyers
2007-07-14 22:57 ` (drop : wrong email thread) " Mathieu Desnoyers
2007-07-15 1:28 ` [PATCH] Text Edit Lock - Architecture Independent Code - kerneldoc Mathieu Desnoyers
2007-07-15 9:04 ` Christoph Hellwig
2007-07-15 23:30 ` Mathieu Desnoyers
2007-07-15 23:35 ` [PATCH] Text Edit Lock - Architecture Independent Code for Implementation Mathieu Desnoyers
2007-07-14 1:21 ` [patch 3/8] Text Edit Lock - i386 Mathieu Desnoyers
2007-07-14 16:18 ` Christoph Hellwig
2007-07-14 20:08 ` [PATCH] Text Edit Lock - i386 Use kernel_text_is_ro Mathieu Desnoyers
2007-07-14 23:31 ` [PATCH] Text Edit Lock - i386 Fix endif CONFIG_DEBUG_RODATA Mathieu Desnoyers
2007-07-15 1:29 ` [PATCH] Text Edit Lock - i386 kerneldoc Mathieu Desnoyers
2007-07-15 23:30 ` Mathieu Desnoyers
2007-07-15 23:36 ` [PATCH] Text Edit Lock - i386 kerneldoc implementation Mathieu Desnoyers
2007-07-14 1:21 ` [patch 4/8] Text Edit Lock - x86_64 Mathieu Desnoyers
2007-07-14 20:16 ` [PATCH] Text Edit Lock - x86_64 Use kernel_tex_is_ro Mathieu Desnoyers
2007-07-14 23:32 ` [PATCH] Text Edit Lock - x86_64 Fix !CONFIG_DEBUG_RODATA Mathieu Desnoyers
2007-07-15 1:30 ` [PATCH] Text Edit Lock - x86_64 kerneldoc Mathieu Desnoyers
2007-07-15 23:30 ` Mathieu Desnoyers
2007-07-15 23:38 ` [PATCH] Text Edit Lock - x86_64 kerneldoc implementation Mathieu Desnoyers
2007-07-14 1:21 ` [patch 5/8] Text Edit Lock - Alternative code for i386 and x86_64 Mathieu Desnoyers
2007-07-14 1:21 ` [patch 6/8] Text Edit Lock - Kprobes architecture independent support Mathieu Desnoyers
2007-07-14 19:56 ` [PATCH] Kprobes - no kprobes_mutex needed around arch_remove_kprobe calls Mathieu Desnoyers
2007-07-14 1:21 ` [patch 7/8] Text Edit Lock - kprobes i386 Mathieu Desnoyers
2007-07-14 1:21 ` [patch 8/8] Text Edit Lock - kprobes x86_64 Mathieu Desnoyers
2007-07-14 10:50 ` [patch 0/8] Text Edit Lock Christoph Hellwig
2007-07-14 15:21 ` Mathieu Desnoyers
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