From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZrKaeTYtF5hqRxM/c6c4AXYiah1l/GjUyju0ZVK5OpElBZuYMggr46q2mGQU/oHB31eniJq ARC-Seal: i=1; a=rsa-sha256; t=1525806405; cv=none; d=google.com; s=arc-20160816; b=oYTGEBDE/RPofMZ9G9fKY/2j1f/I/a0MUe2WzMQhkbRgIVgCi9dcm4fgC1V/w8HYGz 3yg4ygjERX7nCY4vCjFEbmY+LaYLxxybBH4fUGG0B6XgDu+uyvDL51me7jPm9KL7KEWl GPusOoL2MDj4/a73n8O5YVmrO8+Fi5qagDnWsV1liBYHwoeJ/+pPOI5J1LRbDaaIpWCd V0mgX5iE/0b460nWix/3OYRvc91NRzer8KFK9OrtOaVo62gJAfiC7wrW347KC2vbnT1D neWpIYgZ2OQPmIBPmyZnP1A3yvazQTi1n44BcSiVMDhy//gWynsALfFaXygE9MSeYFqM aQmg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:organization:message-id :subject:cc:to:from:date:arc-authentication-results; bh=zYEdgJlJagG0MbsymGVt0rFJsq9R5U2b1QcIS7+iUtg=; b=XhSHewzNXZWVPQt+fYdWrdKwQ4d56Uv498WIDKmKm54o/ddr6Cb9o9nprJ+A2U1bTE dSAGhmXD21Va0mgKAlcTkfZRCrjpoFOBviG34sLDwzMTPAgvkyxbSxwHXQdAqeeBlamH OFMqQsbp/UUqe7FzBm3EA1PuKUA14VaZS3d7YzQ8exKCIZgUjYDGfk5bBigjh/xHeoKl mJXvddyt8M4aEnmYBileR2BeVbP10pUaqE5w+iv7ye9+Fz49TGQLoIRAJLN0te0AdBMx Z8d9TTAqYVB+r04c4scQbd+vejJVtPqhecUTwFKuPY+5GnCUOR8gDuW7jS9ZQ+baZIY0 R6iA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of kim.phillips@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=kim.phillips@arm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of kim.phillips@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=kim.phillips@arm.com Date: Tue, 8 May 2018 14:06:40 -0500 From: Kim Phillips To: Mathieu Poirier Cc: Alexander Shishkin , Alex Williamson , Andrew Morton , David Howells , Eric Auger , Eric Biederman , Gargi Sharma , Geert Uytterhoeven , Greg Kroah-Hartman , Kefeng Wang , Kim Phillips , Kirill Tkhai , Mike Rapoport , Oleg Nesterov , Pavel Tatashin , Rik van Riel , Robin Murphy , Russell King , Thierry Reding , Todd Kjos , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] pid: Export find_task_by_vpid for use in external modules Message-Id: <20180508140640.0e312dba025df75cbf205cdb@arm.com> Organization: Arm X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1599923977519130436?= X-GMAIL-MSGID: =?utf-8?q?1599923977519130436?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This patch is in the context of allowing the Coresight h/w trace driver suite to be loaded as modules. Coresight uses find_task_by_vpid when running in direct capture mode (via sysfs) when getting/setting the context ID comparator to trigger on (/sys/bus/coresight/devices/.etm/ctxid_pid). Cc: Mathieu Poirier Cc: Andrew Morton Cc: Oleg Nesterov Cc: Gargi Sharma Cc: Rik van Riel Cc: Pavel Tatashin Cc: Kefeng Wang Cc: Kirill Tkhai Cc: Mike Rapoport Cc: David Howells Cc: "Eric W. Biederman" Signed-off-by: Kim Phillips --- Current CoreSight callsite: https://lxr.missinglinkelectronics.com/linux/include/linux/coresight.h#L285 A quick look didn't find anything, but if Coresight needs to do something differently, please comment. kernel/pid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/pid.c b/kernel/pid.c index 157fe4b19971..92b1b623f3e0 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -342,6 +342,7 @@ struct task_struct *find_task_by_vpid(pid_t vnr) { return find_task_by_pid_ns(vnr, task_active_pid_ns(current)); } +EXPORT_SYMBOL_GPL(find_task_by_vpid); struct task_struct *find_get_task_by_vpid(pid_t nr) { -- 2.17.0