Hi Andrew,

On Tue, Feb 11, 2020 at 7:30 AM Andrew Morton [off-list ref] wrote:

On Tue, 11 Feb 2020 02:54:52 +0900 Masahiro Yamada [off-list ref] wrote:

quoted

Change a header to mandatory-y if both of the following are met:

[1] At least one architecture (except um) specifies it as generic-y in
    arch/*/include/asm/Kbuild

[2] Every architecture (except um) either has its own implementation
    (arch/*/include/asm/*.h) or specifies it as generic-y in
    arch/*/include/asm/Kbuild

(reads Documentation/kbuild/makefiles.rst to remember what these things
do).

Why are we making this change?  What's the benefit?

One obvious benefit is the diff stat:

 25 files changed, 52 insertions(+), 557 deletions(-)


It is tedious to list generic-y for each arch
that needs it.

So, mandatory-y works like a fallback default
(by just wrapping asm-generic one)
when arch does not have a specific header implementation.

See the following commits:

def3f7cefe4e81c296090e1722a76551142c227c
a1b39bae16a62ce4aae02d958224f19316d98b24


It is tedious to convert headers one by one,
so I processed by a shell script.


-- 
Best Regards
Masahiro Yamada

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