[PATCH] mm/ptdump: Drop GENERIC_PTDUMP
Anshuman Khandual
anshuman.khandual at arm.com
Mon Dec 16 19:48:07 PST 2024
GENERIC_PTDUMP does not guard any code but instead just used for platform's
subscription into core ptdump defined under PTDUMP_CORE, which is selected.
Instead use PTDUMP_CORE for platform subscription and drop GENERIC_PTDUMP.
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Jonathan Corbet <corbet at lwn.net>
Cc: Marc Zyngier <maz at kernel.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Nicholas Piggin <npiggin at gmail.com>
Cc: Paul Walmsley <paul.walmsley at sifive.com>
Cc: Palmer Dabbelt <palmer at dabbelt.com>
Cc: Heiko Carstens <hca at linux.ibm.com>
Cc: Vasily Gorbik <gor at linux.ibm.com>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-doc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: kvmarm at lists.linux.dev
Cc: linuxppc-dev at lists.ozlabs.org
Cc: linux-riscv at lists.infradead.org
Cc: linux-s390 at vger.kernel.org
Cc: linux-mm at kvack.org
Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
---
This patch applies on v6.13-rc3 and has been tested on arm64, although it
also clears build tests on impacted platforms.
Documentation/arch/arm64/ptdump.rst | 1 -
arch/arm64/Kconfig | 2 +-
arch/arm64/kvm/Kconfig | 3 +--
arch/powerpc/Kconfig | 2 +-
arch/powerpc/configs/mpc885_ads_defconfig | 1 -
arch/riscv/Kconfig | 2 +-
arch/s390/Kconfig | 2 +-
arch/x86/Kconfig | 2 +-
arch/x86/Kconfig.debug | 2 +-
kernel/configs/debug.config | 1 -
mm/Kconfig.debug | 8 ++------
11 files changed, 9 insertions(+), 17 deletions(-)
diff --git a/Documentation/arch/arm64/ptdump.rst b/Documentation/arch/arm64/ptdump.rst
index 5dcfc5d7cddf..61ca040a885b 100644
--- a/Documentation/arch/arm64/ptdump.rst
+++ b/Documentation/arch/arm64/ptdump.rst
@@ -22,7 +22,6 @@ offlining of memory being accessed by the ptdump code.
In order to dump the kernel page tables, enable the following
configurations and mount debugfs::
- CONFIG_GENERIC_PTDUMP=y
CONFIG_PTDUMP_CORE=y
CONFIG_PTDUMP_DEBUGFS=y
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 100570a048c5..b5479c8b454c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -154,7 +154,7 @@ config ARM64
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_LIB_DEVMEM_IS_ALLOWED
select GENERIC_PCI_IOMAP
- select GENERIC_PTDUMP
+ select PTDUMP_CORE
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index ead632ad01b4..fe17d7f5b061 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -71,8 +71,7 @@ config PTDUMP_STAGE2_DEBUGFS
depends on KVM
depends on DEBUG_KERNEL
depends on DEBUG_FS
- depends on GENERIC_PTDUMP
- select PTDUMP_CORE
+ depends on PTDUMP_CORE
default n
help
Say Y here if you want to show the stage-2 kernel pagetables
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a0ce777f9706..c716f8df10de 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -203,7 +203,7 @@ config PPC
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_PCI_IOMAP if PCI
- select GENERIC_PTDUMP
+ select PTDUMP_CORE
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_TIME_NS
diff --git a/arch/powerpc/configs/mpc885_ads_defconfig b/arch/powerpc/configs/mpc885_ads_defconfig
index 77306be62e9e..ea6f836407d2 100644
--- a/arch/powerpc/configs/mpc885_ads_defconfig
+++ b/arch/powerpc/configs/mpc885_ads_defconfig
@@ -78,4 +78,3 @@ CONFIG_DEBUG_VM_PGTABLE=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_BDI_SWITCH=y
CONFIG_PPC_EARLY_DEBUG=y
-CONFIG_GENERIC_PTDUMP=y
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index d4a7ca0388c0..05f969729e72 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -111,7 +111,7 @@ config RISCV
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_LIB_DEVMEM_IS_ALLOWED
select GENERIC_PCI_IOMAP
- select GENERIC_PTDUMP if MMU
+ select PTDUMP_CORE if MMU
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL if MMU && 64BIT
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0077969170e8..0e19fe547d84 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -155,7 +155,7 @@ config S390
select GENERIC_CPU_VULNERABILITIES
select GENERIC_ENTRY
select GENERIC_GETTIMEOFDAY
- select GENERIC_PTDUMP
+ select PTDUMP_CORE
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_TIME_NS
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9d7bd0ae48c4..d84cb2ac93ac 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -173,7 +173,7 @@ config X86
select GENERIC_IRQ_RESERVATION_MODE
select GENERIC_IRQ_SHOW
select GENERIC_PENDING_IRQ if SMP
- select GENERIC_PTDUMP
+ select PTDUMP_CORE
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 74777a97e394..198d7f090b98 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -59,7 +59,7 @@ config EARLY_PRINTK_USB_XDBC
config EFI_PGT_DUMP
bool "Dump the EFI pagetable"
depends on EFI
- select PTDUMP_CORE
+ depends on PTDUMP_CORE
help
Enable this if you want to dump the EFI page table before
enabling virtual mode. This can be used to debug miscellaneous
diff --git a/kernel/configs/debug.config b/kernel/configs/debug.config
index 20552f163930..8aafd050b754 100644
--- a/kernel/configs/debug.config
+++ b/kernel/configs/debug.config
@@ -73,7 +73,6 @@ CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VM_PGFLAGS=y
CONFIG_DEBUG_VM_RB=y
CONFIG_DEBUG_VM_VMACACHE=y
-CONFIG_GENERIC_PTDUMP=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
CONFIG_KASAN_INLINE=y
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 41a58536531d..b206e5a11f96 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -187,7 +187,7 @@ config DEBUG_WX
bool "Warn on W+X mappings at boot"
depends on ARCH_HAS_DEBUG_WX
depends on MMU
- select PTDUMP_CORE
+ depends on PTDUMP_CORE
help
Generate a warning if any W+X mappings are found at boot.
@@ -212,9 +212,6 @@ config DEBUG_WX
If in doubt, say "Y".
-config GENERIC_PTDUMP
- bool
-
config PTDUMP_CORE
bool
@@ -222,8 +219,7 @@ config PTDUMP_DEBUGFS
bool "Export kernel pagetable layout to userspace via debugfs"
depends on DEBUG_KERNEL
depends on DEBUG_FS
- depends on GENERIC_PTDUMP
- select PTDUMP_CORE
+ depends on PTDUMP_CORE
help
Say Y here if you want to show the kernel pagetable layout in a
debugfs file. This information is only useful for kernel developers
--
2.30.2
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