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    Subject[PATCH v2 03/27] riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv
    Date
    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 <debug@rivosinc.com>
    ---
    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;
    --
    2.43.2

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