linux-kernel - [PATCH] x86/xen: select HIBERNATE

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Message-ID: <20250829070402.159390-1-lukas.bulwahn@redhat.com>
Date: Fri, 29 Aug 2025 09:04:02 +0200
From: Lukas Bulwahn <lbulwahn@...hat.com>
To: Juergen Gross <jgross@...e.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	"H . Peter Anvin" <hpa@...or.com>,
	xen-devel@...ts.xenproject.org
Cc: kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukas Bulwahn <lukas.bulwahn@...hat.com>
Subject: [PATCH] x86/xen: select HIBERNATE_CALLBACKS more directly

From: Lukas Bulwahn <lukas.bulwahn@...hat.com>

The config XEN_SAVE_RESTORE's only purpose is to select
HIBERNATE_CALLBACKS, when config XEN is set. The XEN config definition can
simply select HIBERNATE_CALLBACKS, though, and the definition of
XEN_SAVE_RESTORE can be dropped.

So, remove this indirection through XEN_SAVE_RESTORE and select
HIBERNATE_CALLBACKS directly. Also, drop the XEN_SAVE_RESTORE from the x86
xen config fragment.

No functional change intended with this clean-up.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...hat.com>
---
 arch/x86/configs/xen.config | 1 -
 arch/x86/xen/Kconfig        | 7 +------
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/x86/configs/xen.config b/arch/x86/configs/xen.config
index d5d091e03bd3..98b6952ba9d2 100644
--- a/arch/x86/configs/xen.config
+++ b/arch/x86/configs/xen.config
@@ -12,7 +12,6 @@ CONFIG_CPU_FREQ=y
 
 # x86 xen specific config options
 CONFIG_XEN_PVH=y
-CONFIG_XEN_SAVE_RESTORE=y
 # CONFIG_XEN_DEBUG_FS is not set
 CONFIG_XEN_MCE_LOG=y
 CONFIG_XEN_ACPI_PROCESSOR=m
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 98d8a50d2aed..aa4040fd9215 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -8,6 +8,7 @@ config XEN
 	depends on PARAVIRT
 	select PARAVIRT_CLOCK
 	select X86_HV_CALLBACK_VECTOR
+	select HIBERNATE_CALLBACKS
 	depends on X86_64 || (X86_32 && X86_PAE)
 	depends on X86_64 || (X86_GENERIC || MPENTIUM4 || MATOM)
 	depends on X86_LOCAL_APIC && X86_TSC
@@ -64,12 +65,6 @@ config XEN_PVHVM_GUEST
 	help
 	  Support running as a Xen PVHVM guest.
 
-config XEN_SAVE_RESTORE
-	bool
-	depends on XEN
-	select HIBERNATE_CALLBACKS
-	default y
-
 config XEN_DEBUG_FS
 	bool "Enable Xen debug and tuning parameters in debugfs"
 	depends on XEN && DEBUG_FS
-- 
2.50.1