+ x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch added to -mm tree

+ x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch added to -mm tree

[akpm]

The patch titled
     Subject: x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef
has been added to the -mm tree.  Its filename is
     x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch

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------------------------------------------------------
From: Jisheng Zhang <jszhang@kernel.org>
Subject: x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef

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

Link: https://lkml.kernel.org/r/20211206160514.2000-4-jszhang@kernel.org
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/kernel/setup.c |   10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

--- a/arch/x86/kernel/setup.c~x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef
+++ a/arch/x86/kernel/setup.c
@@ -391,8 +391,6 @@ static void __init memblock_x86_reserve_
  * --------- Crashkernel reservation ------------------------------
  */
 
-#ifdef CONFIG_KEXEC_CORE
-
 /* 16M alignment for crash kernel regions */
 #define CRASH_ALIGN		SZ_16M
 
@@ -470,6 +468,9 @@ static void __init reserve_crashkernel(v
 	bool high = false;
 	int ret;
 
+	if (!IS_ENABLED(CONFIG_KEXEC_CORE))
+		return;
+
 	total_mem = memblock_phys_mem_size();
 
 	/* crashkernel=XM */
@@ -535,11 +536,6 @@ static void __init reserve_crashkernel(v
 	crashk_res.end   = crash_base + crash_size - 1;
 	insert_resource(&iomem_resource, &crashk_res);
 }
-#else
-static void __init reserve_crashkernel(void)
-{
-}
-#endif
 
 static struct resource standard_io_resources[] = {
 	{ .name = "dma1", .start = 0x00, .end = 0x1f,
_

Patches currently in -mm which might be from jszhang@kernel.org are

kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
riscv-mm-init-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
arm64-mm-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
arm-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch