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docs: conf.py: fix c:function support with Sphinx 3.x

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Sphinx C parser for the C domain is now more pedantic when
trying to identify the function types. That prevents scope
macros to be used as type defines.

Yet, since 3.0.2, it is possible to provide it a list of
such macros. Add them, in order to solve several Sphinx 3.x
warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-09-28 09:42:44 +02:00
parent a57c3522e8
commit b34b86d7a4
1 changed files with 62 additions and 3 deletions
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65
Documentation/conf.py
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@ -47,9 +47,68 @@ extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include',
#
if major >= 3:
sys.stderr.write('''WARNING: The kernel documentation build process
does not work correctly with Sphinx v3.0 and above. Expect errors
in the generated output.
''')
does not work correctly with Sphinx v3.0 and above. Expect errors
in the generated output.
''')
if minor > 0 or patch >= 2:
# Sphinx c function parser is more pedantic with regards to type
# checking. Due to that, having macros at c:function cause problems.
# Those needed to be scaped by using c_id_attributes[] array
c_id_attributes = [
# GCC Compiler types not parsed by Sphinx:
"__restrict__",
# include/linux/compiler_types.h:
"__iomem",
"__kernel",
"noinstr",
"notrace",
"__percpu",
"__rcu",
"__user",
# include/linux/compiler_attributes.h:
"__alias",
"__aligned",
"__aligned_largest",
"__always_inline",
"__assume_aligned",
"__cold",
"__attribute_const__",
"__copy",
"__pure",
"__designated_init",
"__visible",
"__printf",
"__scanf",
"__gnu_inline",
"__malloc",
"__mode",
"__no_caller_saved_registers",
"__noclone",
"__nonstring",
"__noreturn",
"__packed",
"__pure",
"__section",
"__always_unused",
"__maybe_unused",
"__used",
"__weak",
"noinline",
# include/linux/memblock.h:
"__init_memblock",
"__meminit",
# include/linux/init.h:
"__init",
"__ref",
# include/linux/linkage.h:
"asmlinkage",
]
else:
extensions.append('cdomain')