linux-kernel - [PATCH] audit: use time

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Message-Id: <20220829162609.25105-1-wuchi.zero@gmail.com>
Date:   Tue, 30 Aug 2022 00:26:09 +0800
From:   wuchi <wuchi.zero@...il.com>
To:     paul@...l-moore.com, eparis@...hat.com, rgb@...hat.com
Cc:     linux-audit@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH] audit: use time_after to compare time

Using time_{*} macro to compare time is better

Signed-off-by: wuchi <wuchi.zero@...il.com>
---
 kernel/audit.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index a75978ae38ad..9bc0b0301198 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -321,7 +321,6 @@ static inline int audit_rate_check(void)
 	static DEFINE_SPINLOCK(lock);
 	unsigned long		flags;
 	unsigned long		now;
-	unsigned long		elapsed;
 	int			retval	   = 0;
 
 	if (!audit_rate_limit) return 1;
@@ -330,9 +329,8 @@ static inline int audit_rate_check(void)
 	if (++messages < audit_rate_limit) {
 		retval = 1;
 	} else {
-		now     = jiffies;
-		elapsed = now - last_check;
-		if (elapsed > HZ) {
+		now = jiffies;
+		if (time_after(now, last_check + HZ)) {
 			last_check = now;
 			messages   = 0;
 			retval     = 1;
@@ -366,7 +364,7 @@ void audit_log_lost(const char *message)
 	if (!print) {
 		spin_lock_irqsave(&lock, flags);
 		now = jiffies;
-		if (now - last_msg > HZ) {
+		if (time_after(now, last_msg + HZ)) {
 			print = 1;
 			last_msg = now;
 		}
-- 
2.20.1