From: Baoquan He <bhe@redhat.com>
To: kexec@lists.infradead.org, akpm@linux-foundation.org
Cc: linux-s390@vger.kernel.org, Baoquan He <bhe@redhat.com>,
mhklinux@outlook.com, x86@kernel.org,
linux-kernel@vger.kernel.org, nathan@kernel.org,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH linux-next 1/3] x86, crash: don't nest CONFIG_CRASH_DUMP ifdef inside CONFIG_KEXEC_CODE ifdef scope
Date: Mon, 29 Jan 2024 21:50:31 +0800 [thread overview]
Message-ID: <20240129135033.157195-1-bhe@redhat.com> (raw)
Michael pointed out that the #ifdef CONFIG_CRASH_DUMP is nested inside
arch/x86/xen/enlighten_hvm.c.
Although the nesting works well too since CONFIG_CRASH_DUMP has
dependency on CONFIG_KEXEC_CORE, it may cause confuse because there
are places where it's not nested, and people may think it need be nested
even though it doesn't have to.
Fix that by moving CONFIG_CRASH_DUMP ifdeffery of codes out of
CONFIG_KEXEC_CODE ifdeffery scope.
And also fix a building error Nathan reported as below by replacing
CONFIG_KEXEC_CORE ifdef with CONFIG_VMCORE_INFO ifdef.
====
$ curl -LSso .config https://git.alpinelinux.org/aports/plain/community/linux-edge/config-edge.x86_64
$ make -skj"$(nproc)" ARCH=x86_64 CROSS_COMPILE=x86_64-linux- olddefconfig all
...
x86_64-linux-ld: arch/x86/xen/mmu_pv.o: in function `paddr_vmcoreinfo_note':
mmu_pv.c:(.text+0x3af3): undefined reference to `vmcoreinfo_note'
====
Link: https://lore.kernel.org/all/SN6PR02MB4157931105FA68D72E3D3DB8D47B2@SN6PR02MB4157.namprd02.prod.outlook.com/T/#u
Link: https://lore.kernel.org/all/20240126045551.GA126645@dev-arch.thelio-3990X/T/#u
Signed-off-by: Baoquan He <bhe@redhat.com>
---
arch/x86/kernel/cpu/mshyperv.c | 10 ++++++----
arch/x86/kernel/reboot.c | 2 +-
arch/x86/xen/enlighten_hvm.c | 4 ++--
arch/x86/xen/mmu_pv.c | 2 +-
4 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index f8163a59026b..2e8cd5a4ae85 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -209,6 +209,7 @@ static void hv_machine_shutdown(void)
if (kexec_in_progress)
hyperv_cleanup();
}
+#endif /* CONFIG_KEXEC_CORE */
#ifdef CONFIG_CRASH_DUMP
static void hv_machine_crash_shutdown(struct pt_regs *regs)
@@ -222,8 +223,7 @@ static void hv_machine_crash_shutdown(struct pt_regs *regs)
/* Disable the hypercall page when there is only 1 active CPU. */
hyperv_cleanup();
}
-#endif
-#endif /* CONFIG_KEXEC_CORE */
+#endif /* CONFIG_CRASH_DUMP */
#endif /* CONFIG_HYPERV */
static uint32_t __init ms_hyperv_platform(void)
@@ -497,9 +497,11 @@ static void __init ms_hyperv_init_platform(void)
no_timer_check = 1;
#endif
-#if IS_ENABLED(CONFIG_HYPERV) && defined(CONFIG_KEXEC_CORE)
+#if IS_ENABLED(CONFIG_HYPERV)
+#if defined(CONFIG_KEXEC_CORE)
machine_ops.shutdown = hv_machine_shutdown;
-#ifdef CONFIG_CRASH_DUMP
+#endif
+#if defined(CONFIG_CRASH_DUMP)
machine_ops.crash_shutdown = hv_machine_crash_shutdown;
#endif
#endif
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 1287b0d5962f..f3130f762784 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -826,7 +826,7 @@ void machine_halt(void)
machine_ops.halt();
}
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_DUMP
void machine_crash_shutdown(struct pt_regs *regs)
{
machine_ops.crash_shutdown(regs);
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index 09e3db7ff990..0b367c1e086d 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -148,6 +148,7 @@ static void xen_hvm_shutdown(void)
if (kexec_in_progress)
xen_reboot(SHUTDOWN_soft_reset);
}
+#endif
#ifdef CONFIG_CRASH_DUMP
static void xen_hvm_crash_shutdown(struct pt_regs *regs)
@@ -156,7 +157,6 @@ static void xen_hvm_crash_shutdown(struct pt_regs *regs)
xen_reboot(SHUTDOWN_soft_reset);
}
#endif
-#endif
static int xen_cpu_up_prepare_hvm(unsigned int cpu)
{
@@ -238,10 +238,10 @@ static void __init xen_hvm_guest_init(void)
#ifdef CONFIG_KEXEC_CORE
machine_ops.shutdown = xen_hvm_shutdown;
+#endif
#ifdef CONFIG_CRASH_DUMP
machine_ops.crash_shutdown = xen_hvm_crash_shutdown;
#endif
-#endif
}
static __init int xen_parse_nopv(char *arg)
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 218773cfb009..e21974f2cf2d 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -2520,7 +2520,7 @@ int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
}
EXPORT_SYMBOL_GPL(xen_remap_pfn);
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_VMCORE_INFO
phys_addr_t paddr_vmcoreinfo_note(void)
{
if (xen_pv_domain())
--
2.41.0
next reply other threads:[~2024-01-29 13:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-29 13:50 Baoquan He [this message]
2024-01-29 13:50 ` [PATCH linux-next 2/3] crash: fix building error in generic codes Baoquan He
2024-01-29 13:50 ` [PATCH linux-next 3/3] arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c Baoquan He
2024-01-29 18:27 ` [PATCH linux-next 1/3] x86, crash: don't nest CONFIG_CRASH_DUMP ifdef inside CONFIG_KEXEC_CODE ifdef scope Michael Kelley
2024-01-30 0:51 ` Baoquan He
2024-01-30 1:39 ` Michael Kelley
2024-01-30 3:58 ` Baoquan He
2024-01-30 2:59 ` [PATCH v2 " Baoquan He
2024-01-30 5:36 ` Michael Kelley
2024-02-03 0:17 ` [PATCH " Nathan Chancellor
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