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Thu, 28 Mar 2024 21:45:54 -0700 (PDT) From: Deepak Gupta To: paul.walmsley@sifive.com, rick.p.edgecombe@intel.com, broonie@kernel.org, Szabolcs.Nagy@arm.com, kito.cheng@sifive.com, keescook@chromium.org, ajones@ventanamicro.com, conor.dooley@microchip.com, cleger@rivosinc.com, atishp@atishpatra.org, alex@ghiti.fr, bjorn@rivosinc.com, alexghiti@rivosinc.com, samuel.holland@sifive.com, palmer@sifive.com, conor@kernel.org, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: corbet@lwn.net, tech-j-ext@lists.risc-v.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, oleg@redhat.com, akpm@linux-foundation.org, arnd@arndb.de, ebiederm@xmission.com, Liam.Howlett@oracle.com, vbabka@suse.cz, lstoakes@gmail.com, shuah@kernel.org, brauner@kernel.org, debug@rivosinc.com, andy.chiu@sifive.com, jerry.shih@sifive.com, hankuan.chen@sifive.com, greentime.hu@sifive.com, evan@rivosinc.com, xiao.w.wang@intel.com, charlie@rivosinc.com, apatel@ventanamicro.com, mchitale@ventanamicro.com, dbarboza@ventanamicro.com, sameo@rivosinc.com, shikemeng@huaweicloud.com, willy@infradead.org, vincent.chen@sifive.com, guoren@kernel.org, samitolvanen@google.com, songshuaishuai@tinylab.org, gerg@kernel.org, heiko@sntech.de, bhe@redhat.com, jeeheng.sia@starfivetech.com, cyy@cyyself.name, maskray@google.com, ancientmodern4@gmail.com, mathis.salmen@matsal.de, cuiyunhui@bytedance.com, bgray@linux.ibm.com, mpe@ellerman.id.au, baruch@tkos.co.il, alx@kernel.org, david@redhat.com, catalin.marinas@arm.com, revest@chromium.org, josh@joshtriplett.org, shr@devkernel.io, deller@gmx.de, omosnace@redhat.com, ojeda@kernel.org, jhubbard@nvidia.com Subject: [PATCH v2 03/27] riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv Date: Thu, 28 Mar 2024 21:44:35 -0700 Message-Id: <20240329044459.3990638-4-debug@rivosinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240329044459.3990638-1-debug@rivosinc.com> References: <20240329044459.3990638-1-debug@rivosinc.com> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 1766D40010 X-Stat-Signature: t9jddat8e9wrrziquzcxhgzuw95mzncb X-HE-Tag: 1711687555-268216 X-HE-Meta: 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 XC8RsJsf A14itOJCaRSWQRPKfSwfDSV5T+Pa5XAzh05nhn8HXLkfkAl776SNJkE1IGxouSJQGbylCHxvcSWFXaXFVYwbB7MOO+xSS5uK6GKMHAKPNy79s/qd9lAs8VyCv5HM4fNz2m0sNcgUcO8sdXmAu/iifqAIRBzw1AM6CeaVXqTqMRY/SlcZ+OINRGRfGjpbkzQg6vgWAoNtDwq2Iox671JFmiO5Cmlp9Uwhm2/p7ehktiumUzyd4h7u5rBupBMQjpBnNBrZc7yIrNNRsmqJLuV2kOu+u7ATgLOdhOkcQgraT+Yu7nrygX1gMHxheRiJiHqUaCK4XSPHoccoTOlv2UWNrKtSqUh7uKGMifr4NiiOo4zkwYtYWbEnpwJaj4dKw1ZAfRb51iSM2A3WSFQpci6pHT0K8zFjgbyMU+b4aYIXQFyMqDp2ZrAMRABjdteKGQfzfgWx2VkMpGeCEvqij117XTGpBRjeINMvgHu8/4OJTnkbHW4kyBDwmaaEENdP5eXMX5LCyLe+EkvDpI72N9semOw473hawJ5pr6jCoBoz410k59NRp1xgmH1fWwQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: riscv will need an implementation for exit_thread to clean up shadow stack when thread exits. If current thread had shadow stack enabled, shadow stack is allocated by default for any new thread. Signed-off-by: Deepak Gupta --- arch/riscv/Kconfig | 1 + arch/riscv/kernel/process.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index e3142ce531a0..7e0b2bcc388f 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -149,6 +149,7 @@ config RISCV select HAVE_SAMPLE_FTRACE_DIRECT_MULTI select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS + select HAVE_EXIT_THREAD select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select IRQ_DOMAIN select IRQ_FORCED_THREADING diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 9a85c9d4c902..d864eef5a10d 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -195,6 +195,11 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) return 0; } +void exit_thread(struct task_struct *tsk) +{ + return; +} + int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) { unsigned long clone_flags = args->flags;