From: Masami Hiramatsu <mhiramat@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>
Cc: x86@kernel.org, Masami Hiramatsu <mhiramat@kernel.org>,
Yang Bo <yangbo@deepin.com>, Ingo Molnar <mingo@redhat.com>,
"H . Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org,
Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
Laura Abbott <labbott@redhat.com>, Josef Bacik <jbacik@fb.com>,
Alexei Starovoitov <ast@kernel.org>
Subject: [RFC PATCH -tip 8/9] error-injection: Fix to not enabling preemption in pre_handler
Date: Fri, 9 Mar 2018 21:39:16 +0900 [thread overview]
Message-ID: <152059915597.4214.4086303893931787678.stgit@devbox> (raw)
In-Reply-To: <152059891712.4214.9539716544254881611.stgit@devbox>
Since kprobes pre_handler doesn't need to recover preemption
even if it modifies regs->ip anymore, this fixes to remove
the preempt_enable_no_resched() from pre_handler.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/fail_function.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/kernel/fail_function.c b/kernel/fail_function.c
index 21b0122cb39c..b1713521f096 100644
--- a/kernel/fail_function.c
+++ b/kernel/fail_function.c
@@ -176,7 +176,6 @@ static int fei_kprobe_handler(struct kprobe *kp, struct pt_regs *regs)
override_function_with_return(regs);
/* Kprobe specific fixup */
reset_current_kprobe();
- preempt_enable_no_resched();
return 1;
}
next prev parent reply other threads:[~2018-03-09 12:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 12:35 [RFC PATCH -tip 0/9] kprobes: Cleanup jprobe implementation Masami Hiramatsu
2018-03-09 12:35 ` [RFC PATCH -tip 1/9] kprobes: Remove jprobe API implementation Masami Hiramatsu
2018-03-09 12:36 ` [RFC PATCH -tip 2/9] x86: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-03-09 12:36 ` [RFC PATCH -tip 3/9] kprobes: Remove jprobe data structure and interfaces Masami Hiramatsu
2018-03-09 12:37 ` [RFC PATCH -tip 4/9] kprobes: Ignore break_handler Masami Hiramatsu
2018-03-09 12:37 ` [RFC PATCH -tip 5/9] x86: " Masami Hiramatsu
2018-03-09 12:38 ` [RFC PATCH -tip 6/9] kprobes: Remove break_handler from struct kprobe Masami Hiramatsu
2018-03-09 12:38 ` [RFC PATCH -tip 7/9] x86: kprobes: Do not disable preempt on int3 path Masami Hiramatsu
2018-03-09 12:39 ` Masami Hiramatsu [this message]
2018-03-10 8:22 ` [RFC PATCH -tip 8/9] error-injection: Fix to not enabling preemption in pre_handler Ingo Molnar
2018-03-11 15:05 ` Masami Hiramatsu
2018-03-09 12:39 ` [RFC PATCH -tip 9/9] tracing: kprobes: Fix to not enabling preemption Masami Hiramatsu
2018-03-09 23:54 ` [RFC PATCH -tip 0/9] kprobes: Cleanup jprobe implementation Steven Rostedt
2018-03-10 13:55 ` Masami Hiramatsu
2018-03-10 8:24 ` Ingo Molnar
2018-03-11 15:13 ` Masami Hiramatsu
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