linux-kernel - [PATCH v18 12/17] kdump: Reduce unused parameters of parse_crashkernel

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Date:   Wed, 22 Dec 2021 21:08:15 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        <x86@...nel.org>, "H . Peter Anvin" <hpa@...or.com>,
        <linux-kernel@...r.kernel.org>, Dave Young <dyoung@...hat.com>,
        Baoquan He <bhe@...hat.com>, Vivek Goyal <vgoyal@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        <kexec@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        "Will Deacon" <will@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        <devicetree@...r.kernel.org>, Jonathan Corbet <corbet@....net>,
        <linux-doc@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Feng Zhou <zhoufeng.zf@...edance.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Chen Zhou <dingguo.cz@...group.com>,
        "John Donnelly" <John.p.donnelly@...cle.com>
Subject: [PATCH v18 12/17] kdump: Reduce unused parameters of parse_crashkernel_{high|low}

The parameters 'system_ram' and 'crash_base' is only needed by the case of
"crashkernel=X@[offset]". The argument list of parse_crashkernel_suffix()
can help prove this point.

Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 kernel/crash_core.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index a037076b89a9bb2..67f5065e3c3cfcc 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -288,19 +288,19 @@ int __init parse_crashkernel(char *cmdline,
 
 #ifdef CONFIG_64BIT
 static int __init parse_crashkernel_high(char *cmdline,
-			     unsigned long long system_ram,
-			     unsigned long long *crash_size,
-			     unsigned long long *crash_base)
+					 unsigned long long *crash_size)
 {
-	return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, SUFFIX_HIGH);
+	unsigned long long base;
+
+	return __parse_crashkernel(cmdline, 0, crash_size, &base, SUFFIX_HIGH);
 }
 
 static int __init parse_crashkernel_low(char *cmdline,
-			     unsigned long long system_ram,
-			     unsigned long long *crash_size,
-			     unsigned long long *crash_base)
+					unsigned long long *crash_size)
 {
-	return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, SUFFIX_LOW);
+	unsigned long long base;
+
+	return __parse_crashkernel(cmdline, 0, crash_size, &base, SUFFIX_LOW);
 }
 
 static int __init reserve_crashkernel_low(unsigned long long low_size)
@@ -368,14 +368,14 @@ static int __init parse_crashkernel_in_order(char *cmdline,
 
 #ifdef CONFIG_64BIT
 	/* crashkernel=X,high */
-	ret = parse_crashkernel_high(cmdline, system_ram, crash_size, crash_base);
+	ret = parse_crashkernel_high(cmdline, crash_size);
 	if (ret || crash_size <= 0)
 		return CRASHKERNEL_MEM_NONE;
 
 	flag = CRASHKERNEL_MEM_HIGH;
 
 	/* crashkernel=Y,low */
-	ret = parse_crashkernel_low(cmdline, system_ram, low_size, crash_base);
+	ret = parse_crashkernel_low(cmdline, low_size);
 	if (!ret)
 		flag |= CRASHKERNEL_MEM_LOW;
 #endif
-- 
2.25.1