linux-kernel - [PATCH v2 35/35] arch: decompose ARCH_NO

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Date: Mon, 27 May 2024 17:35:21 -0700
From: Ankur Arora <ankur.a.arora@...cle.com>
To: linux-kernel@...r.kernel.org
Cc: tglx@...utronix.de, peterz@...radead.org, torvalds@...ux-foundation.org,
        paulmck@...nel.org, rostedt@...dmis.org, mark.rutland@....com,
        juri.lelli@...hat.com, joel@...lfernandes.org, raghavendra.kt@....com,
        sshegde@...ux.ibm.com, boris.ostrovsky@...cle.com,
        konrad.wilk@...cle.com, Ankur Arora <ankur.a.arora@...cle.com>,
        Richard Henderson <richard.henderson@...aro.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>, Brian Cain <bcain@...cinc.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>
Subject: [PATCH v2 35/35] arch: decompose ARCH_NO_PREEMPT

Now that ARCH_NO_PREEMPT is conditioned only on ARCH_NO_PREEMPT_TOGGLE,
decompose ARCH_NO_PREEMPT into ARCH_NO_PREEMPT_IRQ and
ARCH_NO_PREEMPT_TOGGLE. This allows architecture code to selectively
enable one or the other.

Cc: Richard Henderson <richard.henderson@...aro.org>
Cc: Ivan Kokshaysky <ink@...assic.park.msu.ru>
Cc: Matt Turner <mattst88@...il.com>
Cc: Brian Cain <bcain@...cinc.com>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Richard Weinberger <richard@....at>
Cc: Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc: Johannes Berg <johannes@...solutions.net>
Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>
---
 arch/alpha/Kconfig   | 3 ++-
 arch/hexagon/Kconfig | 3 ++-
 arch/m68k/Kconfig    | 3 ++-
 arch/um/Kconfig      | 3 ++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 3afd042150f8..7fd1d9dcad8d 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -6,7 +6,8 @@ config ALPHA
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
-	select ARCH_NO_PREEMPT
+	select ARCH_NO_PREEMPT_TOGGLE
+	select ARCH_NO_PREEMPT_IRQ
 	select ARCH_NO_SG_CHAIN
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select DMA_OPS if PCI
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index e233b5efa276..3a33a26e1b81 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -6,7 +6,8 @@ config HEXAGON
 	def_bool y
 	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
-	select ARCH_NO_PREEMPT
+	select ARCH_NO_PREEMPT_TOGGLE
+	select ARCH_NO_PREEMPT_IRQ
 	select ARCH_WANT_FRAME_POINTERS
 	select DMA_GLOBAL_POOL
 	select HAVE_PAGE_SIZE_4KB
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 6ffa29585194..3f7d675849ed 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -11,7 +11,8 @@ config M68K
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE if M68K_NONCOHERENT_DMA
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
 	select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
-	select ARCH_NO_PREEMPT if !COLDFIRE
+	select ARCH_NO_PREEMPT_TOGGLE if !COLDFIRE
+	select ARCH_NO_PREEMPT_IRQ if !COLDFIRE
 	select ARCH_USE_MEMTEST if MMU_MOTOROLA
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select BINFMT_FLAT_ARGVP_ENVP_ON_STACK
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 93a5a8999b07..390328e97261 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -11,7 +11,8 @@ config UML
 	select ARCH_HAS_KCOV
 	select ARCH_HAS_STRNCPY_FROM_USER
 	select ARCH_HAS_STRNLEN_USER
-	select ARCH_NO_PREEMPT
+	select ARCH_NO_PREEMPT_TOGGLE
+	select ARCH_NO_PREEMPT_IRQ
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_KASAN if X86_64
 	select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN
-- 
2.31.1