linux-kernel - [PATCH -next 1/3] ftrace: Fix the possible incorrect kernel message

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Message-ID: <20221109094434.84046-2-wangwensheng4@huawei.com>
Date:   Wed, 9 Nov 2022 09:44:32 +0000
From:   Wang Wensheng <wangwensheng4@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <rostedt@...dmis.org>,
        <mhiramat@...nel.org>, <mark.rutland@....com>
CC:     <xuqiang36@...wei.com>, <weiyongjun1@...wei.com>,
        <wangwensheng4@...wei.com>
Subject: [PATCH -next 1/3] ftrace: Fix the possible incorrect kernel message

If the number of mcount entries is an integer multiple of
ENTRIES_PER_PAGE, the page count showing on the console would be wrong.

Signed-off-by: Wang Wensheng <wangwensheng4@...wei.com>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index fbf2543111c0..c571c2813c11 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -7401,7 +7401,7 @@ void __init ftrace_init(void)
 	}
 
 	pr_info("ftrace: allocating %ld entries in %ld pages\n",
-		count, count / ENTRIES_PER_PAGE + 1);
+		count, DIV_ROUND_UP(count, ENTRIES_PER_PAGE));
 
 	ret = ftrace_process_locs(NULL,
 				  __start_mcount_loc,
-- 
2.17.1