add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/kernel/tsacct.c
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@@ -1,19 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * tsacct.c - System accounting over taskstats interface
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  *
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  * Copyright (C) Jay Lan,	<jlan@sgi.com>
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- *
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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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  */
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 #include <linux/kernel.h>
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@@ -35,6 +24,7 @@
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 	const struct cred *tcred;
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 	u64 utime, stime, utimescaled, stimescaled;
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 	u64 delta;
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+	time64_t btime;
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 	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
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@@ -43,9 +33,11 @@
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 	/* Convert to micro seconds */
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 	do_div(delta, NSEC_PER_USEC);
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 	stats->ac_etime = delta;
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-	/* Convert to seconds for btime */
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-	do_div(delta, USEC_PER_SEC);
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-	stats->ac_btime = get_seconds() - delta;
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+	/* Convert to seconds for btime (note y2106 limit) */
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+	btime = ktime_get_real_seconds() - div_u64(delta, USEC_PER_SEC);
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+	stats->ac_btime = clamp_t(time64_t, btime, 0, U32_MAX);
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+	stats->ac_btime64 = btime;
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+
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 	if (tsk->flags & PF_EXITING)
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 		stats->ac_exitcode = tsk->exit_code;
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 	if (thread_group_leader(tsk) && (tsk->flags & PF_FORKNOEXEC))