Le 02/02/2022 à 06:16, Saeed Mahameed a écrit :

On 01 Feb 20:58, Jakub Kicinski wrote:

quoted

On Tue, 1 Feb 2022 20:46:03 -0800 Saeed Mahameed wrote:

quoted

I am getting mixed messages here, on one hand we know that this patch
might break some old or def configs, but on the other hand people claim
that they have to manually fixup their own configs every time
"something in configs" changes and they are fine with that.

Obviously I belong to the 2nd camp, hence this patch..

I can sum it up with "it's fine to controllably break *some* .configs 
for
the greater good" .. that's my .2cent.

I think we agree that we don't care about oldconfigs IOW someone's
random config.

But we do care about defconfigs in the tree, if those indeed include
ethernet drivers which would get masked out by vendor=n - they need
fixin':

$ find arch/ | grep defconfig
arch/x86/configs/i386_defconfig
arch/x86/configs/x86_64_defconfig
arch/ia64/configs/generic_defconfig
arch/ia64/configs/gensparse_defconfig
...

First one from the top:

$ make O=build_tmp/ i386_defconfig
$ $EDITOR drivers/net/ethernet/intel/Kconfig
$ git diff

diff --git a/drivers/net/ethernet/intel/Kconfig 

b/drivers/net/ethernet/intel/Kconfig
index 3facb55b7161..b9fdf2a835b0 100644

--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig

@@ -5,7 +5,6 @@

config NET_VENDOR_INTEL
       bool "Intel devices"
-       default y
       help
         If you have a network (Ethernet) card belonging to this 
class, say Y.

$ make O=build_tmp/ i386_defconfig
$ diff -urpb build_tmp/.config.old build_tmp/.config

--- build_tmp/.config.old    2022-02-01 20:55:37.087373905 -0800
+++ build_tmp/.config    2022-02-01 20:56:32.126044628 -0800

@@ -1784,22 +1784,7 @@ CONFIG_NET_VENDOR_GOOGLE=y

# CONFIG_GVE is not set
CONFIG_NET_VENDOR_HUAWEI=y
# CONFIG_HINIC is not set
-CONFIG_NET_VENDOR_I825XX=y
-CONFIG_NET_VENDOR_INTEL=y
-CONFIG_E100=y
-CONFIG_E1000=y
-CONFIG_E1000E=y
-CONFIG_E1000E_HWTS=y
-# CONFIG_IGB is not set
-# CONFIG_IGBVF is not set
-# CONFIG_IXGB is not set
-# CONFIG_IXGBE is not set
-# CONFIG_IXGBEVF is not set
-# CONFIG_I40E is not set
-# CONFIG_I40EVF is not set
-# CONFIG_ICE is not set
-# CONFIG_FM10K is not set
-# CONFIG_IGC is not set
+# CONFIG_NET_VENDOR_INTEL is not set

We can introduce CONFIG_NET_LEGACY_VENDOR that selects all current vendors.
it will be off by default but will be added where needed in the defconfigs

Why such a hack ?

I think we can fix all defconfig with some scripting, all you have to do 
it to add the relevant CONFIG_NET_VENDOR_SOMEONE=y wherever you find one 
of its boards in the defconfig.

Christophe