linux-kernel - [PATCH] xen: use time_is_before_eq_jiffies() instead of open coding it

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Message-Id: <1646018104-61415-1-git-send-email-wangqing@vivo.com>
Date:   Sun, 27 Feb 2022 19:15:03 -0800
From:   Qing Wang <wangqing@...o.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Cc:     Wang Qing <wangqing@...o.com>
Subject: [PATCH] xen: use time_is_before_eq_jiffies() instead of open coding it

From: Wang Qing <wangqing@...o.com>

Use the helper function time_is_{before,after}_jiffies() to improve
code readability.

Signed-off-by: Wang Qing <wangqing@...o.com>
---
 drivers/xen/balloon.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index a2c4fc49..dfe26fa
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -59,6 +59,7 @@
 #include <linux/slab.h>
 #include <linux/sysctl.h>
 #include <linux/moduleparam.h>
+#include <linux/jiffies.h>
 
 #include <asm/page.h>
 #include <asm/tlb.h>
@@ -794,7 +795,7 @@ static int __init balloon_wait_finish(void)
 		if (balloon_state == BP_ECANCELED) {
 			pr_warn_once("Initial ballooning failed, %ld pages need to be freed.\n",
 				     -credit);
-			if (jiffies - last_changed >= HZ * balloon_boot_timeout)
+			if (time_is_before_eq_jiffies(last_changed + HZ * balloon_boot_timeout))
 				panic("Initial ballooning failed!\n");
 		}
 
-- 
2.7.4