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[107.220.129.194]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66f7efc9dbfsm4424690d50.9.2026.09.01.08.51.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Sep 2026 08:51:52 -0700 (PDT) From: Matt Turner To: linux-alpha@vger.kernel.org, richard.henderson@linaro.org Cc: linmag7@gmail.com, linux-kernel@vger.kernel.org Subject: [PATCH 21/24] alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM Date: Tue, 1 Sep 2026 11:50:34 -0400 Message-ID: <46250102699dd2f07b6ee19ca58edf3a9cdfa0de.1788277742.git.mattst88@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit activate_mm() on Alpha calls __load_new_mm_context() which assigns a new ASID and invokes PALcode swpctx. On SMP, an interrupt arriving between the ASID update and the page table switch could see inconsistent state. Ensure activate_mm() is called with interrupts disabled during exec. Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Matt Turner --- arch/alpha/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git ./arch/alpha/Kconfig ./arch/alpha/Kconfig index 827b224f2f8a..bda8443a7323 100644 --- ./arch/alpha/Kconfig +++ ./arch/alpha/Kconfig @@ -37,6 +37,7 @@ config ALPHA select GENERIC_PCI_IOMAP select AUTO_IRQ_AFFINITY if SMP select GENERIC_IRQ_SHOW + select ARCH_WANT_IRQS_OFF_ACTIVATE_MM select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_LD_ORPHAN_WARN select ARCH_HAVE_NMI_SAFE_CMPXCHG -- 2.54.0