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Wed, 13 Nov 2024 17:48:24 +1100 (AEDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1731480502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UR7iHX45jbd3zRVPmJ4qHkxT+yZlpGkin9tX25AvgR0=; b=3ZsovUEn7U16XXODrRWvxNWP2Mgzs/aXaJj1/eAlbViEspVwXOBG+W6vn1RY9ptwtFU312 zK8FrIbQBaNPBD9jw71eQ9jXXlOv8TcaEID3LE12iHO0DOZ0PJssOUWiFNZTVSc4TvD8xp UMiBYwuzcx0jqOvaQdBKSQAMwFh2XfK1NWZvkKrrmIElipF5LHDIcSNhE6uEwfYBvVJPCk 3607pwdXWYX5pWw2sF/maxJ2x8pAwWW2G4G7+38H9Qds7QiWTZw7v75QxTMUsBrXRwRmv+ NpS1Kf1rSDX6pMI65yuPvm7/uhimYjEhFKaG2whfkI+/PpBpPEDf5yfQfCLLLw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1731480502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UR7iHX45jbd3zRVPmJ4qHkxT+yZlpGkin9tX25AvgR0=; b=ba9jOIpj4HnkGH2jX2YjXl87zvrewCJ07aMGMo/cWthoagyG2h2Fo2HQ4s0kJJJbANLLlT zKEShp2MRIZfW6Dw== To: Luming Yu , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, luming.yu@gmail.com Cc: Luming Yu Subject: Re: [PATCH v2 3/8] powerpc/debug: implement HAVE_USER_RETURN_NOTIFIER In-Reply-To: <027637B09D70E22F+20241111031934.1579-6-luming.yu@shingroup.cn> References: <20241111031934.1579-2-luming.yu@shingroup.cn> <027637B09D70E22F+20241111031934.1579-6-luming.yu@shingroup.cn> Date: Wed, 13 Nov 2024 07:48:37 +0100 Message-ID: <874j4bmxx6.ffs@tglx> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Mon, Nov 11 2024 at 11:19, Luming Yu wrote: > enable the common entry of user return notifier for powerpc as > a debug feature. What's the debug feature? There are ZERO user return notifiers registered in PowerPC, so your "debug feature" is just a waste of CPU cycles. Thanks, tglx