From patchwork Mon Jul 1 22:39:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13718686 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8667D84A2B; Mon, 1 Jul 2024 22:39:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719873582; cv=none; b=sivWsXVAu80gNw7fxFtT1dx/xSqHSDCm6Tj+dmmzOJIITlkqekPteJMl4TzD3oxodXvC1NREdFFPA9JiVWYASKCz94z2bTXEfNHSNtJothNjeLhtMq0bh6NTCeuaXekHXJKVEUHw415DpYYClTJ7CfEakPs8wEMh2fS6qtxqJXo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719873582; c=relaxed/simple; bh=z0ddvbF8FumBOjGC+wG+fQgjyM9XIIz6hh6DhuruuXM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bjNqlf/c3Z8f/sLL6TfLCkxUFEW8JUErXqL01aLIXNXOPC4UerlELZq4umpRXUlsnbdTFmDAZ7gYud1wH6iWze6N94xdeUpIqaYnLSy5YdRkzfkIb408Dd/UBh6+IyeUTeDqJ+qODGqZylZsmYzrlLDy5b0tAZT7qOv66b2QV+0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=buzDRbzE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="buzDRbzE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34AAAC116B1; Mon, 1 Jul 2024 22:39:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719873582; bh=z0ddvbF8FumBOjGC+wG+fQgjyM9XIIz6hh6DhuruuXM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=buzDRbzELZOFGyr55dgbjmdweAF0jX2IQYK1aZvVPDeZmCYuV9Ha3K3mdYuRF8IR/ FEhw4+FyG8BCCCMKLAnQw9aCotaoXaGW2xpKeTAbvuKdwCNIon62yEzZ2QzqoyVGPF KWj//OK2Tngcsj5uQO6vuT++DfvYALMNg0ohwlZJAJuM8D8aAb9ISRIUEHy5QWfQyf sOByHcp5mcnJ4WxidS5KK80dKL2rNpe+40ZE7A8/eGIlOcmU9TM58wRvgxF8jN6Zpv ybArGgEu2+zBxSwxi+pgCvBajOMKb4dio6jaX+s8na0jjLe0Qm3E6Q3HuEK24q+tJt uHQtIRDC1D4TA== From: Andrii Nakryiko To: linux-trace-kernel@vger.kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, oleg@redhat.com Cc: peterz@infradead.org, mingo@redhat.com, bpf@vger.kernel.org, jolsa@kernel.org, paulmck@kernel.org, clm@meta.com, Andrii Nakryiko Subject: [PATCH v2 01/12] uprobes: update outdated comment Date: Mon, 1 Jul 2024 15:39:24 -0700 Message-ID: <20240701223935.3783951-2-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240701223935.3783951-1-andrii@kernel.org> References: <20240701223935.3783951-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 There is no task_struct passed into get_user_pages_remote() anymore, drop the parts of comment mentioning NULL tsk, it's just confusing at this point. Signed-off-by: Andrii Nakryiko Acked-by: Oleg Nesterov --- kernel/events/uprobes.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 99be2adedbc0..081821fd529a 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -2030,10 +2030,8 @@ static int is_trap_at_addr(struct mm_struct *mm, unsigned long vaddr) goto out; /* - * The NULL 'tsk' here ensures that any faults that occur here - * will not be accounted to the task. 'mm' *is* current->mm, - * but we treat this as a 'remote' access since it is - * essentially a kernel access to the memory. + * 'mm' *is* current->mm, but we treat this as a 'remote' access since + * it is essentially a kernel access to the memory. */ result = get_user_pages_remote(mm, vaddr, 1, FOLL_FORCE, &page, NULL); if (result < 0)