HAVE_ARCH_TRANSPARENT_HUGEPAGE has been defined in arch/Kconfig already,
the ARM64 version is identical with it and the default value is Y. So remove
the redundant definition and just select it under CONFIG_ARM64.
Signed-off-by: Yang Shi <yang.shi(a)linaro.org>
---
arch/arm64/Kconfig | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e5de825..496c1b4 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -98,6 +98,7 @@ config ARM64
select SYSCTL_EXCEPTION_TRACE
select HAVE_CONTEXT_TRACKING
select HAVE_ARM_SMCCC
+ select HAVE_ARCH_TRANSPARENT_HUGEPAGE
help
ARM 64-bit (AArch64) Linux support.
@@ -580,9 +581,6 @@ config SYS_SUPPORTS_HUGETLBFS
config ARCH_WANT_HUGE_PMD_SHARE
def_bool y if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
-config HAVE_ARCH_TRANSPARENT_HUGEPAGE
- def_bool y
-
config ARCH_HAS_CACHE_LINE_SIZE
def_bool y
--
2.0.2
Hi everyone,
I attended the Embedded Linux Conference earlier this month and have now
returned home from the extended trip, so it seems like a good time to
share my experience.
The event was a combination of ELC with the OpenIoTSummit, so it was
huge with 800 participants and nine parallel tracks. Often enough there
were multiple interesting topics at the same time, and as usual the
"hallway track" -- meeting people in person to discuss further topics
is the most important one.
Slides for most talks have now become available at
http://events.linuxfoundation.org/events/embedded-linux-conference
and videos were promised to get posted soonish. Some personal
highlights include:
* Porting Linux to a new archicture by Joël Porquet
http://events.linuxfoundation.org/sites/events/files/slides/elc-2016.pdf
I've talked about this topic before myself at previous conferences,
and his talk was particularly well structured and easy to follow,
covering all the important parts. Probably not what most of you need
for your work though.
* Lessons from Ion by Laura Abbott
http://events.linuxfoundation.org/sites/events/files/slides/elc16.pdf
Memory management for GPUs remains an interesting topic, and Laura
gave an excellent retrospective of what happened with Google's
Ion approach, what went wrong, and what problems remain to be
solved. Unfortunately only about 10 people were in the room, as it
was the very last session and it conflicted with Grant Likely's
popular talk about "Hardware Design for Linux Engineers".
* Understanding a real-time system by Steven Rostedt
http://events.linuxfoundation.org/sites/events/files/slides/elc-understandi…
Stephen's talks are always worth attending, even when there is little
actual new information in them. See the video if you have anything to
do with realtime systems
* OpenBMC by Tian Fang
http://events.linuxfoundation.org/sites/events/files/slides/OpenBMC_2016ELC…
Facebook are doing one of two projects to bring a proper open source
and secure OS into the baseboard management controller. This is
incredibly important work, and I'd recommend reading the LWN article
about the talk at https://lwn.net/Articles/682944/.
One outcome was that this article has triggered the other OpenBMC team
(at IBM) to speed up working on their kernel patches to get support for
the popular AST2xxx SoC family mainlined, we should see patches soon.
Note that this is the same BMC that is used to manage most ARM servers,
and it normally runs a closed-down ARM9 or ARM11 Linux distro itself.
I initially planned to attend without giving a talk myself because I could
not think of a good topic, but Mark Brown had the idea that I could talk
about my side project of fixing build warnings, and that worked out great
in the end. There is even an LWN article about it at
http://lwn.net/Articles/683476/ (for non-subscribers: https://lwn.net/SubscriberLink/683476/180f1aedcd1d0b5b/ ) and my slides are
at http://events.linuxfoundation.org/sites/events/files/slides/Static%20code%2…
The room was almost full, and the topic was well received (though I still
think my two presentations last year were much better).
I was talking at the same time as Mark Rutland and Karen Sandler, and I
probably want to see both of their presentations once they become available
for streaming.
Arnd
