[Buildroot] [PATCH] configs/snps_arc*_defconfig: update linux version

[Buildroot] [PATCH] configs/snps_arc*_defconfig: update linux version

[Evgeniy Didin]

With this commit we update Linux kernel version to 4.16.3
and Linux headers version to 4.16.
For some configs we switch headers version to be independent from
Linux kernel version.

Signed-off-by: Evgeniy Didin <didin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: arc-buildroot at synopsys.com
---
 configs/snps_arc700_axs101_defconfig  | 6 +++---
 configs/snps_archs38_axs103_defconfig | 6 +++---
 configs/snps_archs38_haps_defconfig   | 6 +++---
 configs/snps_archs38_hsdk_defconfig   | 4 ++--
 configs/snps_archs38_vdk_defconfig    | 6 +++---
 5 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/configs/snps_arc700_axs101_defconfig b/configs/snps_arc700_axs101_defconfig
index 0fefaf4aa8..fef5a49fdd 100644
--- a/configs/snps_arc700_axs101_defconfig
+++ b/configs/snps_arc700_axs101_defconfig
@@ -8,13 +8,13 @@ BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
 
-# Linux headers same as kernel, a 4.15 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_15=y
+# Linux headers
+BR2_KERNEL_HEADERS_4_16=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.15"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.3"
 BR2_LINUX_KERNEL_DEFCONFIG="axs101"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 
diff --git a/configs/snps_archs38_axs103_defconfig b/configs/snps_archs38_axs103_defconfig
index 39ceeae433..f6e94aff3c 100644
--- a/configs/snps_archs38_axs103_defconfig
+++ b/configs/snps_archs38_axs103_defconfig
@@ -9,13 +9,13 @@ BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
 
-# Linux headers same as kernel, a 4.15 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_15=y
+# Linux headers
+BR2_KERNEL_HEADERS_4_16=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.15"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.3"
 BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 
diff --git a/configs/snps_archs38_haps_defconfig b/configs/snps_archs38_haps_defconfig
index 6583c1ec3a..554d12f0bb 100644
--- a/configs/snps_archs38_haps_defconfig
+++ b/configs/snps_archs38_haps_defconfig
@@ -7,12 +7,12 @@ BR2_TARGET_GENERIC_HOSTNAME="zebu_hs"
 BR2_TARGET_GENERIC_ISSUE="Welcome to the HAPS Development Platform"
 BR2_TARGET_ROOTFS_INITRAMFS=y
 
-# Linux headers same as kernel, a 4.15 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_15=y
+# Linux headers
+BR2_KERNEL_HEADERS_4_16=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.15"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.3"
 BR2_LINUX_KERNEL_DEFCONFIG="haps_hs_smp"
 BR2_LINUX_KERNEL_VMLINUX=y
diff --git a/configs/snps_archs38_hsdk_defconfig b/configs/snps_archs38_hsdk_defconfig
index 125063b444..30b5301dca 100644
--- a/configs/snps_archs38_hsdk_defconfig
+++ b/configs/snps_archs38_hsdk_defconfig
@@ -3,7 +3,7 @@ BR2_arcle=y
 BR2_archs38=y
 
 # Linux headers
-BR2_KERNEL_HEADERS_4_14=y
+BR2_KERNEL_HEADERS_4_16=y
 
 # System
 BR2_TARGET_GENERIC_HOSTNAME="hsdk"
@@ -13,7 +13,7 @@ BR2_SYSTEM_DHCP="eth0"
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.14.4"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.3"
 BR2_LINUX_KERNEL_DEFCONFIG="hsdk"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/synopsys/hsdk/linux.fragment"
 
diff --git a/configs/snps_archs38_vdk_defconfig b/configs/snps_archs38_vdk_defconfig
index 46b539beec..5be134de81 100644
--- a/configs/snps_archs38_vdk_defconfig
+++ b/configs/snps_archs38_vdk_defconfig
@@ -8,13 +8,13 @@ BR2_TARGET_GENERIC_ISSUE="Welcome to the HS38 VDK Software Development Platform"
 BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
 BR2_TARGET_ROOTFS_EXT2=y
 
-# Linux headers same as kernel, a 4.15 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_15=y
+# Linux headers
+BR2_KERNEL_HEADERS_4_16=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.15"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.16.3"
 BR2_LINUX_KERNEL_DEFCONFIG="vdk_hs38_smp"
 BR2_LINUX_KERNEL_VMLINUX=y
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
-- 
2.16.2

[Buildroot] [PATCH] configs/snps_arc*_defconfig: update linux version

[Thomas Petazzoni]

Hello,

On Thu, 19 Apr 2018 16:55:24 +0300, Evgeniy Didin wrote:
> With this commit we update Linux kernel version to 4.16.3
> and Linux headers version to 4.16.
> For some configs we switch headers version to be independent from
> Linux kernel version.

Why ? The change doesn't make you independent at all from the Linux
kernel version, and causes two kernel tarballs to be downloaded instead
of one, which isn't nice.

Could you justify this change ?

(side note: could you use my @bootlin.com address instead of
@free-electrons.com. The DEVELOPERS file has been updated since quite
some time about this already. Thanks a lot!)

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

[Buildroot] [arc-buildroot] Re: [PATCH] configs/snps_arc*_defconfig: update linux version

[Evgeniy Didin]

Hello,

> Hello,
> 
> On Thu, 19 Apr 2018 16:55:24 +0300, Evgeniy Didin wrote:
> > With this commit we update Linux kernel version to 4.16.3
> > and Linux headers version to 4.16.
> > For some configs we switch headers version to be independent from
> > Linux kernel version.
> 
> Why ? The change doesn't make you independent at all from the Linux
> kernel version, and causes two kernel tarballs to be downloaded instead
> of one, which isn't nice.
> 
> Could you justify this change ?

With option BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_1*=y
BR2_KERNEL_HEADERS_AS_KERNEL parameter is set.
Defconfig is meant as a starting point for work with the board.
In these case if user wants to change version of Linux kernel,
such error appears:
---------------------------->8---------------------------------
Incorrect selection of kernel headers: expected 4.16.x, got 4.15.x,
----------------------------8<---------------------------------
Also in case of choosing new kernel rc's, error 404 occurs.
For inexperienced users, these errors may not be obvious.

> (side note: could you use my @bootlin.com address instead of
> @free-electrons.com. The DEVELOPERS file has been updated since quite
> some time about this already. Thanks a lot!)

Sure

Best regards,
Evgeniy Didin

[Buildroot] [arc-buildroot] Re: [PATCH] configs/snps_arc*_defconfig: update linux version

[Thomas Petazzoni]

Hello Evgeniy,

On Thu, 19 Apr 2018 15:16:51 +0000, Evgeniy Didin wrote:
> Hello,
> 
> > Hello,
> > 
> > On Thu, 19 Apr 2018 16:55:24 +0300, Evgeniy Didin wrote:  
> > > With this commit we update Linux kernel version to 4.16.3
> > > and Linux headers version to 4.16.
> > > For some configs we switch headers version to be independent from
> > > Linux kernel version.  
> > 
> > Why ? The change doesn't make you independent at all from the Linux
> > kernel version, and causes two kernel tarballs to be downloaded instead
> > of one, which isn't nice.
> > 
> > Could you justify this change ?  
> 
> With option BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_1*=y
> BR2_KERNEL_HEADERS_AS_KERNEL parameter is set.

Yes, and this is what we want.

> Defconfig is meant as a starting point for work with the board.
> In these case if user wants to change version of Linux kernel,
> such error appears:
> ---------------------------->8---------------------------------  
> Incorrect selection of kernel headers: expected 4.16.x, got 4.15.x,
> ----------------------------8<---------------------------------
> Also in case of choosing new kernel rc's, error 404 occurs.
> For inexperienced users, these errors may not be obvious.

I do understand your concern. However, it is actually even worse if
your defconfig selects 4.16 kernel headers: if the user changes
the kernel version itself from 4.16 to 4.10, the user will
run a 4.10 kernel, with a toolchain compiled against 4.16 kernel
headers, which isn't good.

Also, specifying a fixed kernel headers version like you're doing means
that the kernel source code gets downloaded twice.

In addition all our defconfigs use this principle, and we are not going
to change this principle for just a few defconfigs. Either we change
this for all defconfigs, or we keep it as is for all defconfigs.
Therefore, I would recommend you to bump the Linux kernel version in
the snps_arc_* defconfigs without changing this, and if you really
think the current situation is not convenient, open up the discussion
inn a broader way.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com