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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@redhat.com>
Cc: "Naveen N . Rao" <naveen.n.rao@linux.vnet.ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
	"David S . Miller" <davem@davemloft.net>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH -tip v2 3/5] kprobes: Remove meaningless BUG_ON from reuse_unused_kprobe
Date: Tue, 11 Sep 2018 19:20:11 +0900	[thread overview]
Message-ID: <153666121154.21306.17540752948574483565.stgit@devbox> (raw)
In-Reply-To: <153666112297.21306.4621579144717171778.stgit@devbox>

Since reuse_unused_kprobe is called when the given kprobe
is unused, checking it inside again with BUG_ON is
meaningless. Remove it.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 kernel/kprobes.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 231569e1e2c8..277a6cbe83db 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -704,7 +704,6 @@ static void reuse_unused_kprobe(struct kprobe *ap)
 {
 	struct optimized_kprobe *op;
 
-	BUG_ON(!kprobe_unused(ap));
 	/*
 	 * Unused kprobe MUST be on the way of delayed unoptimizing (means
 	 * there is still a relative jump) and disabled.


  parent reply	other threads:[~2018-09-11 10:20 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-11 10:18 [PATCH -tip v2 0/5] kprobes: Remove BUG_ON from kprobes Masami Hiramatsu
2018-09-11 10:19 ` [PATCH -tip v2 1/5] kprobes: Remove meaningless BUG_ON from disarming process Masami Hiramatsu
2018-09-12  6:51   ` [tip:perf/core] kprobes: Remove pointless BUG_ON() " tip-bot for Masami Hiramatsu
2018-09-11 10:19 ` [PATCH -tip v2 2/5] kprobes: Remove meaningless BUG_ON from add_new_kprobe Masami Hiramatsu
2018-09-12  6:52   ` [tip:perf/core] kprobes: Remove pointless BUG_ON() from add_new_kprobe() tip-bot for Masami Hiramatsu
2018-09-11 10:20 ` Masami Hiramatsu [this message]
2018-09-12  6:52   ` [tip:perf/core] kprobes: Remove pointless BUG_ON() from reuse_unused_kprobe() tip-bot for Masami Hiramatsu
2018-09-11 10:20 ` [PATCH -tip v2 4/5] kprobes: Return error if fail to reuse kprobe instead of BUG_ON Masami Hiramatsu
2018-09-12  6:53   ` [tip:perf/core] kprobes: Return error if we fail to reuse kprobe instead of BUG_ON() tip-bot for Masami Hiramatsu
2018-09-11 10:21 ` [PATCH -tip v2 5/5] kprobes: Don't call BUG_ON if there is a kprobe in use on free list Masami Hiramatsu
2018-09-12  6:54   ` [tip:perf/core] kprobes: Don't call BUG_ON() " tip-bot for Masami Hiramatsu

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