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Sat, 05 Sep 2026 12:29:41 -0700 (PDT) From: Matt Turner Date: Sat, 05 Sep 2026 15:29:29 -0400 Subject: [PATCH v2 08/22] alpha: select ARCH_SUPPORTS_INT128 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260905-arch-kconfig-options-v2-v2-8-83e8245761a2@gmail.com> References: <20260905-arch-kconfig-options-v2-v2-0-83e8245761a2@gmail.com> In-Reply-To: <20260905-arch-kconfig-options-v2-v2-0-83e8245761a2@gmail.com> To: Richard Henderson , Magnus Lindholm , Kees Cook , Marco Elver , Andrey Konovalov , Andrey Ryabinin , Jonathan Corbet , Shuah Khan , Randy Dunlap Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-hardening@vger.kernel.org, linux-doc@vger.kernel.org, Matt Turner X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=926; i=mattst88@gmail.com; h=from:subject:message-id; bh=scxjr4+0cYn4zmGgf8pkKMv/1ZeiH25c7BmJTtd/n2U=; b=owGbwMvMwCW25rVmCc8sv+mMp9WSGLLm5E7e9zn9BVPjPY/rPnynI0+9ZJ8osni52LobYt/Sr T/L72/u6PjIwiDGxTBTTJElbr0iy6y2HUt9Tkv/gpnDygQyRFqkgQEIWBj4chPzSo10jPRMtQ31 DIEMHaN4iJweg0ZmcXFpapFuWkGRQ15+SWJJZn5esV5+QWpeQXqBXlpmWklGRn5RcSrQCL281BJ TV0c3I0MDE0tHCzMnC0dTE2dnJ0MnN0dHZ1cnI0tzEwNnS0cTV0tzBi5OAZhrghMZ/ofucApZt2 Blp69wr8vLp/LLmvZ9cNyaXbNAlulCr1X1rmSGfypvb8UbfV6bbpcSVDDTKMD2ztW9Klfn3O/6u fa0nMjMCEYA X-Developer-Key: i=mattst88@gmail.com; a=openpgp; fpr=3BB639E56F861FA2E86505690FDD682D974CA72A gcc supports __int128 on Alpha, and the 64x64 to 128-bit multiply that the users in the scheduler and in lib/ care about maps onto mulq/umulh rather than an out-of-line libgcc helper. Gate the select on CC_HAS_INT128 as the other 64-bit architectures do. Assisted-by: Claude:claude-opus-5 Signed-off-by: Matt Turner Tested-by: Magnus Lindholm Reviewed-by: Magnus Lindholm --- arch/alpha/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 2672971b83f3..bed3f1c8d9d2 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -16,6 +16,7 @@ config ALPHA select ARCH_NO_PREEMPT select ARCH_NO_SG_CHAIN select ARCH_SUPPORTS_ATOMIC_RMW + select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 select ARCH_USE_CMPXCHG_LOCKREF select FORCE_PCI select PCI_DOMAINS if PCI -- 2.54.0