linux-kernel - [PATCH v4 09/10] arm64: kdump: Use IS_ENABLED(CONFIG_CRASH

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Message-Id: <767e34a7ec29c417fdd5ff6e0fc76bc93d4f3c6f.1626266516.git.geert+renesas@glider.be>
Date:   Wed, 14 Jul 2021 14:50:19 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Nicolas Pitre <nico@...xnic.net>,
        Ard Biesheuvel <ardb@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Nick Kossifidis <mick@....forth.gr>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Frank Rowand <frowand.list@...il.com>,
        Dave Young <dyoung@...hat.com>, Mike Rapoport <rppt@...nel.org>
Cc:     Baoquan He <bhe@...hat.com>, Vivek Goyal <vgoyal@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kexec@...ts.infradead.org,
        linux-mm@...ck.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v4 09/10] arm64: kdump: Use IS_ENABLED(CONFIG_CRASH_DUMP) instead of #ifdef

Replace the conditional compilation using "#ifdef CONFIG_CRASH_DUMP" by
a check for "IS_ENABLED(CONFIG_CRASH_DUMP)", to increase compile
coverage and to simplify the code.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v4:
  - New.
---
 arch/arm64/mm/init.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index f90ba99437c0f3c9..dc2a5b73232843e4 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -124,7 +124,6 @@ static void __init reserve_crashkernel(void)
 }
 #endif /* CONFIG_KEXEC_CORE */
 
-#ifdef CONFIG_CRASH_DUMP
 /*
  * reserve_elfcorehdr() - reserves memory for elf core header
  *
@@ -135,7 +134,7 @@ static void __init reserve_crashkernel(void)
  */
 static void __init reserve_elfcorehdr(void)
 {
-	if (!elfcorehdr_size)
+	if (!IS_ENABLED(CONFIG_CRASH_DUMP) || !elfcorehdr_size)
 		return;
 
 	if (memblock_is_region_reserved(elfcorehdr_addr, elfcorehdr_size)) {
@@ -148,11 +147,6 @@ static void __init reserve_elfcorehdr(void)
 	pr_info("Reserving %lldKB of memory at 0x%llx for elfcorehdr\n",
 		elfcorehdr_size >> 10, elfcorehdr_addr);
 }
-#else
-static void __init reserve_elfcorehdr(void)
-{
-}
-#endif /* CONFIG_CRASH_DUMP */
 
 /*
  * Return the maximum physical address for a zone accessible by the given bits
-- 
2.25.1