Re: [PATCH 2/9] ARM: qcom: remove unnecessary boot_lock

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


Quoting Linus Walleij (2019-01-10 04:50:56)
> On Thu, Dec 13, 2018 at 7:00 PM Russell King <rmk+kernel@xxxxxxxxxxxxxxx> wrote:
> > The boot_lock is something that was required for ARM development
> > platforms to ensure that the delay calibration worked properly.  This
> > is not necessary for modern platforms that have better bus bandwidth
> > and do not need to calibrate the delay loop for secondary cores.
> > Remove the boot_lock entirely.
> >
> > Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
> Andy have you had a chance to test/apply this patch?
> I think the majority of Qcom systems use CLKSRC_QCOM
> which registers an arch delay timer and swiftly bypasses the
> calibration anyways so this code is pretty much pointless.
> There is a question about MSM8974 though. This appears
> to not use CLKSRC_QCOM but rather HAVE_ARM_ARCH_TIMER.
> drivers/clocksource/arm_arch_timer.c seems to
> not register a delay timer, which is probably something that
> should be fixed?
> Mark/Marc: is there any specific reason to why the ARM arch
> timer does not register an arch delay timer?

Doesn't the ARM arch timer get registered in
arch/arm/kernel/arch_timer.c via arch_timer_delay_timer_register()?

[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux