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Building against the tip/sched/core asff7db0bf24("sched/numa: Prefer using an idle CPU as a migration target instead of comparing tasks") with the arm64 defconfig (which doesn't have CONFIG_SCHED_SMT set) leads to: kernel/sched/fair.c:1525:20: warning: 'test_idle_cores' declared 'static' but never defined [-Wunused-function] static inline bool test_idle_cores(int cpu, bool def); ^~~~~~~~~~~~~~~ Rather than define it in its own CONFIG_SCHED_SMT #define island, bunch it up with test_idle_cores(). Reported-by: Anshuman Khandual <anshuman.khandual@arm.com> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> [mgorman@techsingularity.net: Edit changelog, minor style change] Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Fixes:ff7db0bf24("sched/numa: Prefer using an idle CPU as a migration target instead of comparing tasks") Link: https://lkml.kernel.org/r/20200303110258.1092-3-mgorman@techsingularity.net
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.