linux-kernel - Re: [PATCH v3) posix-timers: make it configurable

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Message-ID: <CALAqxLVfu3+-9Ucu4zvaeWXW3kpBeVZFhy831v31gmRFMBOCpw@mail.gmail.com>
Date:   Thu, 15 Sep 2016 11:13:20 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Nicolas Pitre <nicolas.pitre@...aro.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Josh Triplett <josh@...htriplett.org>,
        Richard Cochran <richardcochran@...il.com>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3) posix-timers: make it configurable

> diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
> index 62824f2fe4..62504a2c9f 100644
> --- a/kernel/time/Kconfig
> +++ b/kernel/time/Kconfig
> @@ -195,3 +195,21 @@ config HIGH_RES_TIMERS
>
>  endmenu
>  endif
> +
> +config POSIX_TIMERS
> +       bool "Posix Clocks & timers" if EMBEDDED
> +       default y
> +       help
> +         This includes native support for POSIX timers to the kernel.
> +         Most embedded systems may have no use for them and therefore they
> +         can be configured out to reduce the size of the kernel image.
> +
> +         When this option is disabled, the following syscalls won't be
> +         available: timer_create, timer_gettime: timer_getoverrun,
> +         timer_settime, timer_delete, clock_adjtime. Furthermore, the
> +         clock_settime, clock_gettime, clock_getres and clock_nanosleep
> +         syscalls will be limited to CLOCK_REALTIME and CLOCK_MONOTONIC
> +         only.
> +
> +         If unsure say y.
>

One thought.. Should this go under:
    Configure standard kernel features (expert users)
rather then a top level item under  General Setup ?

thanks
-john