change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/kernel/time/jiffies.c
..
..
@@ -1,25 +1,9 @@
1
-/***********************************************************************
2
-* linux/kernel/time/jiffies.c
3
-*
4
-* This file contains the jiffies based clocksource.
5
-*
6
-* Copyright (C) 2004, 2005 IBM, John Stultz (johnstul@us.ibm.com)
7
-*
8
-* This program is free software; you can redistribute it and/or modify
9
-* it under the terms of the GNU General Public License as published by
10
-* the Free Software Foundation; either version 2 of the License, or
11
-* (at your option) any later version.
12
-*
13
-* This program is distributed in the hope that it will be useful,
14
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
-* GNU General Public License for more details.
17
-*
18
-* You should have received a copy of the GNU General Public License
19
-* along with this program; if not, write to the Free Software
20
-* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
-*
22
-************************************************************************/
1
+// SPDX-License-Identifier: GPL-2.0+
2
+/*
3
+ * This file contains the jiffies based clocksource.
4
+ *
5
+ * Copyright (C) 2004, 2005 IBM, John Stultz (johnstul@us.ibm.com)
6
+ */
23
7
 #include <linux/clocksource.h>
24
8
 #include <linux/jiffies.h>
25
9
 #include <linux/module.h>
..
..
@@ -74,18 +58,19 @@
74
58
 	.max_cycles	= 10,
75
59
 };
76
60
 
77
-__cacheline_aligned_in_smp DEFINE_SEQLOCK(jiffies_lock);
61
+__cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(jiffies_lock);
62
+__cacheline_aligned_in_smp seqcount_t jiffies_seq;
78
63
 
79
64
 #if (BITS_PER_LONG < 64)
80
65
 u64 get_jiffies_64(void)
81
66
 {
82
-	unsigned long seq;
67
+	unsigned int seq;
83
68
 	u64 ret;
84
69
 
85
70
 	do {
86
-		seq = read_seqbegin(&jiffies_lock);
71
+		seq = read_seqcount_begin(&jiffies_seq);
87
72
 		ret = jiffies_64;
88
-	} while (read_seqretry(&jiffies_lock, seq));
73
+	} while (read_seqcount_retry(&jiffies_seq, seq));
89
74
 	return ret;
90
75
 }
91
76
 EXPORT_SYMBOL(get_jiffies_64);
..
..
@@ -105,7 +90,7 @@
105
90
 	return &clocksource_jiffies;
106
91
 }
107
92
 
108
-struct clocksource refined_jiffies;
93
+static struct clocksource refined_jiffies;
109
94
 
110
95
 int register_refined_jiffies(long cycles_per_second)
111
96
 {