93db393772
[ Upstream commit 6bb955fce08cbc8495a72755130d2d220994faee ] Patch series "Selftests: Fix compilation warnings due to missing _GNU_SOURCE definition", v2. Since kselftest_harness.h introduces asprintf()[1], many selftests have compilation warnings or errors due to missing _GNU_SOURCE definitions. The issue stems from a lack of a LINE_MAX definition in Android (see commit 38c957f07038), which is the reason why asprintf() was introduced. We tried adding _GNU_SOURCE definitions to more selftests to fix, but asprintf() may continue to cause problems, and since it is quite late in the 6.9 cycle, we would like to revert 809216233555 first to provide testing for forks[2]. [1] https://lore.kernel.org/all/20240411231954.62156-1-edliaw@google.com [2] https://lore.kernel.org/linux-kselftest/ZjuA3aY_iHkjP7bQ@google.com This patch (of 2): This reverts commit 8092162335554c8ef5e7f50eff68aa9cfbdbf865. asprintf() is declared in stdio.h when defining _GNU_SOURCE, but stdio.h is so common that many files don't define _GNU_SOURCE before including stdio.h, and defining _GNU_SOURCE after including stdio.h will no longer take effect, which causes warnings or even errors during compilation in many selftests. Revert 'commit 809216233555 ("selftests/harness: remove use of LINE_MAX")' as that came in quite late in the 6.9 cycle. Link: https://lkml.kernel.org/r/20240509053113.43462-1-tao1.su@linux.intel.com Link: https://lore.kernel.org/linux-kselftest/ZjuA3aY_iHkjP7bQ@google.com/ Link: https://lkml.kernel.org/r/20240509053113.43462-2-tao1.su@linux.intel.com Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX") Signed-off-by: Tao Su <tao1.su@linux.intel.com> Reviewed-by: Simon Horman <horms@kernel.org> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Bongsu Jeon <bongsu.jeon@samsung.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Edward Liaw <edliaw@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Ivan Orlov <ivan.orlov0322@gmail.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Mark Brown <broonie@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Takashi Iwai <tiwai@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.