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When fall-through warnings was enabled by default the following warning
was starting to show up:
In file included from ../include/linux/kernel.h:15,
from ../include/linux/list.h:9,
from ../include/linux/kobject.h:19,
from ../include/linux/of.h:17,
from ../include/linux/irqdomain.h:35,
from ../include/linux/acpi.h:13,
from ../arch/arm64/kernel/smp.c:9:
../arch/arm64/kernel/smp.c: In function ‘__cpu_up’:
../include/linux/printk.h:302:2: warning: this statement may fall
through [-Wimplicit-fallthrough=]
printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/arm64/kernel/smp.c:156:4: note: in expansion of macro ‘pr_crit’
pr_crit("CPU%u: may not have shut down cleanly\n", cpu);
^~~~~~~
../arch/arm64/kernel/smp.c:157:3: note: here
case CPU_STUCK_IN_KERNEL:
^~~~
Rework so that the compiler doesn't warn about fall-through.
Fixes: d93512ef0f0e ("Makefile: Globally enable fall-through warning")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
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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 Restructured Text 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.