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SubjectRe: [PATCH v6 1/9] kernel: Support TIF_SYSCALL_INTERCEPT flag
On Fri, Sep 04, 2020 at 04:31:39PM -0400, Gabriel Krisman Bertazi wrote:
> +static inline void __set_tsk_syscall_intercept(struct task_struct *tsk,
> + unsigned int type)
> +{
> + tsk->syscall_intercept |= type;
> +
> + if (tsk->syscall_intercept)
> + set_tsk_thread_flag(tsk, TIF_SYSCALL_INTERCEPT);
> +}

Did the above want to be:

unsigned int old = tsk->syscall_intercept;
tsk->syscall_intercept |= type;
if (!old)
set_tsk_thread_flag(tsk, TIF_SYSCALL_INTERCEPT)

?

> +static inline void __clear_tsk_syscall_intercept(struct task_struct *tsk,
> + unsigned int type)
> +{
> + tsk->syscall_intercept &= ~type;
> +
> + if (tsk->syscall_intercept == 0)
> + clear_tsk_thread_flag(tsk, TIF_SYSCALL_INTERCEPT);
> +}

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