netdev - Re: [PATCH 01/12] Make and configuration files.

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Date:   Wed, 28 Dec 2016 06:47:11 +0200
From:   Rami Rosen <roszenrami@...il.com>
To:     David VomLehn <vomlehn@...as.net>
Cc:     Netdev <netdev@...r.kernel.org>,
        Simon Edelhaus <Simon.Edelhaus@...antia.com>,
        Dmitrii Tarakanov <Dmitrii.Tarakanov@...antia.com>,
        Alexander Loktionov <Alexander.Loktionov@...antia.com>
Subject: Re: [PATCH 01/12] Make and configuration files.

Hi, David,

For the Makefile, you should follow the pattern which is common in
Linux Kernel Ethernet drivers, for example,
http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/i40e/Makefile or
http://lxr.free-electrons.com/source/drivers/net/ethernet/mellanox/mlx5/core/Makefile

Don't think that I ever saw usage of "-j" in a kernel module Makefile;
apart from it, "-j4" is specific to one platform with a given number
of cores, and of course there can be platforms with many more cores,
for which it is less suitable. You can pass the "-j" when running
"make" from the command line, there is no justification to put it in a
Makefile:

>+all:
>+       $(MAKE) -j4 CC=$(CC) -C $(BUILD_DIR) M=$(PWD) modules
>+
>+dox:   .doxygen
>+       @doxygen $<
>+
>+clean:
>+       $(MAKE) -j4 -C $(BUILD_DIR) M=$(PWD) clean

Don't think I ever encountered load/unload targets in Linux Kernel
Makefiles (not talking about out of tree  projects):

>+load:
>+       insmod ./$(TARGET).ko
>+
>+unload:
>+       rmmod ./$(TARGET).ko

Regards,
Rami Rosen