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[195.250.132.146]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43796a6ba57sm22103738f8f.15.2026.02.16.05.43.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Feb 2026 05:43:11 -0800 (PST) From: Petr Pavlu To: Steven Rostedt , Masami Hiramatsu Cc: Mathieu Desnoyers , Tom Zanussi , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Petr Pavlu Subject: [PATCH v2 4/4] tracing: Free up file->private_data for use by individual events Date: Mon, 16 Feb 2026 14:42:00 +0100 Message-ID: <20260216134247.1311631-5-petr.pavlu@suse.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260216134247.1311631-1-petr.pavlu@suse.com> References: <20260216134247.1311631-1-petr.pavlu@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The tracing_open_file_tr() function currently copies the trace_event_file pointer from inode->i_private to file->private_data when the file is successfully opened. This duplication is not particularly useful, as all event code should utilize event_file_file() or event_file_data() to retrieve a trace_event_file pointer from a file struct and these access functions read file->f_inode->i_private. Moreover, this setup requires the code for opening hist files to explicitly clear file->private_data before calling single_open(), since this function expects the private_data member to be set to NULL and uses it to store a pointer to a seq_file. Remove the unnecessary setting of file->private_data in tracing_open_file_tr() and simplify the hist code. Signed-off-by: Petr Pavlu --- kernel/trace/trace.c | 2 -- kernel/trace/trace_events_hist.c | 4 ---- 2 files changed, 6 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b1cb30a7b83d..01af8d88a468 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4804,8 +4804,6 @@ int tracing_open_file_tr(struct inode *inode, struct = file *filp) event_file_get(file); } =20 - filp->private_data =3D inode->i_private; - return 0; } =20 diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_h= ist.c index 744c2aa3d668..1ca3e14d7531 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -5831,8 +5831,6 @@ static int event_hist_open(struct inode *inode, struc= t file *file) hist_file->file =3D file; hist_file->last_act =3D get_hist_hit_count(event_file); =20 - /* Clear private_data to avoid warning in single_open() */ - file->private_data =3D NULL; ret =3D single_open(file, hist_show, hist_file); if (ret) { kfree(hist_file); @@ -6114,8 +6112,6 @@ static int event_hist_debug_open(struct inode *inode,= struct file *file) if (ret) return ret; =20 - /* Clear private_data to avoid warning in single_open() */ - file->private_data =3D NULL; ret =3D single_open(file, hist_debug_show, file); if (ret) tracing_release_file_tr(inode, file); --=20 2.52.0