From: Miroslav Benes <mbenes@suse.cz>
To: rostedt@goodmis.org, mingo@redhat.com, jpoimboe@redhat.com,
jikos@kernel.org, pmladek@suse.com, joe.lawrence@redhat.com
Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
Miroslav Benes <mbenes@suse.cz>
Subject: [PATCH 3/3] livepatch: Use FTRACE_OPS_FL_PERMANENT
Date: Mon, 7 Oct 2019 10:17:14 +0200 [thread overview]
Message-ID: <20191007081714.20259-4-mbenes@suse.cz> (raw)
In-Reply-To: <20191007081714.20259-1-mbenes@suse.cz>
Use FTRACE_OPS_FL_PERMANENT flag to be immune to toggling the
'ftrace_enabled' sysctl knob.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
---
kernel/livepatch/patch.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c
index bd43537702bd..b552cf2d85f8 100644
--- a/kernel/livepatch/patch.c
+++ b/kernel/livepatch/patch.c
@@ -196,7 +196,8 @@ static int klp_patch_func(struct klp_func *func)
ops->fops.func = klp_ftrace_handler;
ops->fops.flags = FTRACE_OPS_FL_SAVE_REGS |
FTRACE_OPS_FL_DYNAMIC |
- FTRACE_OPS_FL_IPMODIFY;
+ FTRACE_OPS_FL_IPMODIFY |
+ FTRACE_OPS_FL_PERMANENT;
list_add(&ops->node, &klp_ops);
--
2.23.0
next prev parent reply other threads:[~2019-10-07 8:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 8:17 [PATCH 0/3] ftrace: Introduce PERMANENT ftrace_ops flag Miroslav Benes
2019-10-07 8:17 ` [PATCH 1/3] ftrace: Make test_rec_ops_needs_regs() generic Miroslav Benes
2019-10-07 8:17 ` [PATCH 2/3] ftrace: Introduce PERMANENT ftrace_ops flag Miroslav Benes
2019-10-07 8:17 ` Miroslav Benes [this message]
2019-10-08 19:35 ` [PATCH 0/3] " Joe Lawrence
2019-10-08 19:50 ` Steven Rostedt
2019-10-09 10:33 ` Miroslav Benes
2019-10-09 11:22 ` Petr Mladek
2019-10-09 14:23 ` Joe Lawrence
2019-10-09 14:26 ` Steven Rostedt
2019-10-10 8:50 ` Petr Mladek
2019-10-10 13:14 ` Steven Rostedt
2019-10-10 13:38 ` Miroslav Benes
2019-10-10 13:43 ` Steven Rostedt
2019-10-10 13:44 ` Steven Rostedt
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