linux-kernel - Re: [PATCH 03/10] ftrace: Add register_ftrace

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Message-ID: <alpine.LSU.2.21.1911131500210.18679@pobox.suse.cz>
Date:   Wed, 13 Nov 2019 15:13:44 +0100 (CET)
From:   Miroslav Benes <mbenes@...e.cz>
To:     Steven Rostedt <rostedt@...dmis.org>
cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        X86 ML <x86@...nel.org>, Nadav Amit <nadav.amit@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH 03/10] ftrace: Add register_ftrace_direct()


> @@ -1757,6 +1761,18 @@ static bool __ftrace_hash_rec_update(struct ftrace_ops *ops,
>  				return false;
>  			rec->flags--;
>  
> +			if (ops->flags & FTRACE_OPS_FL_DIRECT)
> +				rec->flags &= ~FTRACE_FL_DIRECT;
> +
> +			/*
> +			 * Only the internal direct_ops should have the
> +			 * DIRECT flag set. Thus, if it is removing a
> +			 * function, then that function should no longer
> +			 * be direct.
> +			 */
> +			if (ops->flags & FTRACE_OPS_FL_DIRECT)
> +				rec->flags &= ~FTRACE_FL_DIRECT;
> +

The flag is dropped twice here.

Miroslav