[PATCH v4 1/2] ptrace: add PTRACE_SET_SYSCALL_INFO syscall skipping support

[Oleg Nesterov]

On 07/09, Dmitry V. Levin wrote:
>
> System call suppression via PTRACE_SYSCALL_INFO_ENTRY is currently not
> implemented.  On some architectures (e.g. MIPS), when a system call is
> skipped by setting the syscall number to -1 at the entry stop, the
> architecture entry path unconditionally overwrites the return value
> register with -ENOSYS, clobbering any custom return value set by the
> tracer at the entry stop.

Thanks! LGTM.

Oleg.