mainlining shenanigans
Factorizing and unifying cpuhp callback range invocations, especially for the hotunplug path, where two different ways of decrementing were used. The first one, decrements before the callback is called: cpuhp_thread_fun() state = st->state; st->state--; cpuhp_invoke_callback(state); The second one, after: take_down_cpu()|cpuhp_down_callbacks() cpuhp_invoke_callback(st->state); st->state--; This is problematic for rolling back the steps in case of error, as depending on the decrement, the rollback will start from N or N-1. It also makes tracing inconsistent, between steps run in the cpuhp thread and the others. Additionally, avoid useless cpuhp_thread_fun() loops by skipping empty steps. Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210216103506.416286-4-vincent.donnefort@arm.com |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
README |
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.