doc:it_IT: align Italian documentation

Translation for the following patches

commit 7dfbea4c468c ("scripts: remove namespace.pl")
commit 1a63f9cce7b7 ("docs: Remove make headers_check from checklist")
commit 1e013ff7cb54 ("docs: Document cross-referencing using relative path")
commit 0be1511f516e ("Documentation: doc-guide: fixes to sphinx.rst")
commit 911358401284 ("kernel-doc: Fix example in Nested structs/unions")
commit 875f82cb374b ("Documentation/submitting-patches: Extend commit message layout description")
commit 78f101a1b258 ("Documentation/submitting-patches: Add blurb about backtraces in commit messages")
commit f0ea149eee6b ("docs: submitting-patches: Emphasise the requirement to Cc: stable when using Fixes: tag")
commit 05a5f51ca566 ("Documentation: Replace lkml.org links with lore")
commit 9bf19b78a203 ("Documentation/submitting-patches: Document the SoB chain")
commit b7592e5b82db ("docs: Remove the Microsoft rhetoric")
commit 26606ce072d4 ("coding-style.rst: Avoid comma statements")
commit dd58e649742a ("docs: Make syscalls' helpers naming consistent")
commit 460cd17e9f7d ("net: switch to the kernel.org patchwork instance")
commit 163ba35ff371 ("doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line")
commit 0ef597c3ac49 ("docs: remove mention of ENABLE_MUST_CHECK")
commit f8408264c77a ("drivers: Remove CONFIG_OPROFILE support")
commit 0653c358d2dc ("scsi: Drop gdth driver")
commit f8ae7bbec726 ("net: x25_asy: Delete the x25_asy driver")
commit cf6d6fc27936 ("docs: process/howto.rst: make sections on bug reporting match practice")
commit da514157c4f0 ("docs: make reporting-bugs.rst obsolete")
commit 4f8af077a02e ("docs: Fix reST markup when linking to sections")
commit 3a4928cf5e3c ("Documentation: kernel-hacking: change 'current()' to 'current'")
commit c170f2eb9648 ("docs: Document cross-referencing between documentation pages")

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Link: https://lore.kernel.org/r/20210409224104.30471-1-federico.vaga@vaga.pv.it
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line

You should use KCFLAGS to pass additional compiler flags from the
command line. Using EXTRA_CFLAGS is wrong.

EXTRA_CFLAGS is supposed to specify flags applied only to the current
Makefile (and now deprecated in favor of ccflags-y).

It is still used in arch/mips/kvm/Makefile (and possibly in external
modules too). Passing EXTRA_CFLAGS from the command line overwrites
it and breaks the build.

I also fixed drivers/gpu/drm/tilcdc/Makefile because commit 816175dd1fd7
("drivers/gpu/drm/tilcdc: Makefile, only -Werror when no -W* in
EXTRA_CFLAGS") was based on the same misunderstanding.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Federico Vaga <federico.vaga@vaga.pv.it>
Link: https://lore.kernel.org/r/20210221152524.197693-1-masahiroy@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

docs: fault-injection: convert docs to ReST and rename to *.rst

The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

configs: get rid of obsolete CONFIG_ENABLE_WARN_DEPRECATED

This Kconfig option was removed during v4.19 development in commit
771c035372a0 ("deprecate the '__deprecated' attribute warnings entirely
and for good") so there's no point to keep it in defconfigs any longer.

FWIW defconfigs were patched with:
--------------------------->8----------------------
find . -name *_defconfig -exec sed -i '/CONFIG_ENABLE_WARN_DEPRECATED/d' {} \;
--------------------------->8----------------------

Link: http://lkml.kernel.org/r/20190128152434.41969-1-abrodkin@synopsys.com
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

doc:it: add some process/* translations

Translated documents:
- 2.Process
- 3.Early-stage
- 4.Coding
- 5.Posting
- 6.Followthrough
- 7.AdvancedTopics
- 8.Conclusion
- adding-syscalls

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Alessia Mantegazza <amantegazza@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

doc:it_IT: add some process/* translations

This patch does not translate entirely the subfolder "process/"
but only part of it (to begin with).

In order to avoid broken links, I included empty documents
for those which are not yet translated.

In order to be able to refer to all documents in "process/",
I added a sphinx label to those which had not one.

Translated documents:
- howto
- 1.Intro
- clang-format
- coding-style
- kernel-driver-statement
- magic-number
- volatile-considered-harmful
- development-process

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Alessia Mantegazza <amantegazza@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>