add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ptp/ptp_sysfs.c
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@@ -1,21 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * PTP 1588 clock support - sysfs interface.
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  *
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  * Copyright (C) 2010 OMICRON electronics GmbH
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License as published by
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- *  the Free Software Foundation; either version 2 of the License, or
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- *  (at your option) any later version.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; if not, write to the Free Software
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- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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 #include <linux/capability.h>
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 #include <linux/slab.h>
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@@ -26,7 +13,7 @@
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 			       struct device_attribute *attr, char *page)
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 {
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 	struct ptp_clock *ptp = dev_get_drvdata(dev);
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-	return snprintf(page, PAGE_SIZE-1, "%s\n", ptp->info->name);
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+	return sysfs_emit(page, "%s\n", ptp->info->name);
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 }
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 static DEVICE_ATTR_RO(clock_name);
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@@ -240,7 +227,7 @@
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 	mutex_unlock(&ptp->pincfg_mux);
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-	return snprintf(page, PAGE_SIZE, "%u %u\n", func, chan);
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+	return sysfs_emit(page, "%u %u\n", func, chan);
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 }
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 static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr,