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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Morton , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Jinjie Ruan , linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Cc: Yury Norov Subject: [PATCH v2 1/5] arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE Date: Wed, 6 May 2026 13:52:02 -0400 Message-ID: <20260506175207.110893-2-ynorov@nvidia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260506175207.110893-1-ynorov@nvidia.com> References: <20260506175207.110893-1-ynorov@nvidia.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BYAPR03CA0016.namprd03.prod.outlook.com (2603:10b6:a02:a8::29) To CY8PR12MB8300.namprd12.prod.outlook.com (2603:10b6:930:7d::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY8PR12MB8300:EE_|CH3PR12MB8188:EE_ X-MS-Office365-Filtering-Correlation-Id: dbdde94b-8d0e-42b2-6312-08deab9833d4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|10070799003|7416014|376014|1800799024|921020|3023799003|18002099003|56012099003|22082099003; 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Signed-off-by: Yury Norov --- arch/arm/Kconfig | 2 +- arch/arm64/Kconfig | 2 +- arch/loongarch/Kconfig | 2 +- arch/mips/Kconfig | 2 +- lib/Kconfig | 1 + 5 files changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 71fc5dd4123f..0e963e54fe06 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -83,7 +83,7 @@ config ARM select HARDIRQS_SW_RESEND select HAS_IOPORT select HAVE_ARCH_AUDITSYSCALL if AEABI && !OABI_COMPAT - select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 + select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 && BITREVERSE select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU && (!PREEMPT_RT || !SMP) select HAVE_ARCH_KFENCE if MMU && !XIP_KERNEL select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index fe60738e5943..f5bb62c2ba9c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -150,7 +150,7 @@ config ARM64 select HAVE_ACPI_APEI if (ACPI && EFI) select HAVE_ALIGNED_STRUCT_PAGE select HAVE_ARCH_AUDITSYSCALL - select HAVE_ARCH_BITREVERSE + select HAVE_ARCH_BITREVERSE if BITREVERSE select HAVE_ARCH_COMPILER_H select HAVE_ARCH_HUGE_VMALLOC select HAVE_ARCH_HUGE_VMAP diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 3b042dbb2c41..6c3444e31c0e 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -115,7 +115,7 @@ config LOONGARCH select HAS_IOPORT select HAVE_ALIGNED_STRUCT_PAGE if 64BIT select HAVE_ARCH_AUDITSYSCALL - select HAVE_ARCH_BITREVERSE if 64BIT + select HAVE_ARCH_BITREVERSE if 64BIT && BITREVERSE select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_JUMP_LABEL_RELATIVE select HAVE_ARCH_KASAN if 64BIT diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 4364f3dba688..7e1494e0dbfa 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2026,7 +2026,7 @@ config CPU_MIPSR6 default y if CPU_MIPS32_R6 || CPU_MIPS64_R6 select CPU_HAS_RIXI select CPU_HAS_DIEI if !CPU_DIEI_BROKEN - select HAVE_ARCH_BITREVERSE + select HAVE_ARCH_BITREVERSE if BITREVERSE select MIPS_ASID_BITS_VARIABLE select MIPS_SPRAM diff --git a/lib/Kconfig b/lib/Kconfig index 00a9509636c1..d8e7e89ae320 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -58,6 +58,7 @@ config BITREVERSE config HAVE_ARCH_BITREVERSE bool default n + depends on BITREVERSE help This option enables the use of hardware bit-reversal instructions on architectures which support such operations. -- 2.51.0