linux-kernel - Re: [PATCH] x86: _

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Message-ID: <4768AF6F.3050603@redhat.com>
Date:	Wed, 19 Dec 2007 00:43:11 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Harvey Harrison <harvey.harrison@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	prasanna@...ibm.com, anil.s.keshavamurthy@...el.com,
	davem@...emloft.net, systemtap-ml <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] x86: __kprobes annotations

Harvey Harrison wrote:
> __always_inline on some static functions was to ensure they ended
> up in the .kprobes.text section. Mark this explicitly.

It is good to me.
Thanks!

> 
> Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
Acked-by: Masami Hiramatsu <mhiramat@...hat.com>

> ---
>  arch/x86/kernel/kprobes.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
> index c7a26be..521a469 100644
> --- a/arch/x86/kernel/kprobes.c
> +++ b/arch/x86/kernel/kprobes.c
> @@ -159,7 +159,7 @@ struct kretprobe_blackpoint kretprobe_blacklist[] = {
>  const int kretprobe_blacklist_size = ARRAY_SIZE(kretprobe_blacklist);
>  
>  /* Insert a jump instruction at address 'from', which jumps to address 'to'.*/
> -static void set_jmp_op(void *from, void *to)
> +static void __kprobes set_jmp_op(void *from, void *to)
>  {
>  	struct __arch_jmp_op {
>  		char op;
> @@ -174,7 +174,7 @@ static void set_jmp_op(void *from, void *to)
>   * Returns non-zero if opcode is boostable.
>   * RIP relative instructions are adjusted at copying time in 64 bits mode
>   */
> -static int can_boost(kprobe_opcode_t *opcodes)
> +static int __kprobes can_boost(kprobe_opcode_t *opcodes)
>  {
>  	kprobe_opcode_t opcode;
>  	kprobe_opcode_t *orig_opcodes = opcodes;
> @@ -392,13 +392,13 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
>  		kcb->kprobe_saved_flags &= ~X86_EFLAGS_IF;
>  }
>  
> -static void clear_btf(void)
> +static void __kprobes clear_btf(void)
>  {
>  	if (test_thread_flag(TIF_DEBUGCTLMSR))
>  		wrmsr(MSR_IA32_DEBUGCTLMSR, 0, 0);
>  }
>  
> -static void restore_btf(void)
> +static void __kprobes restore_btf(void)
>  {
>  	if (test_thread_flag(TIF_DEBUGCTLMSR))
>  		wrmsr(MSR_IA32_DEBUGCTLMSR, current->thread.debugctlmsr, 0);

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com, masami.hiramatsu.pt@...achi.com

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