Hi Linus, This contains a fix for SMP && !MMU archs for percpu which has been tested by arm and sh. It seems in the past they have gotten away due to mapping of vm functions to km functions, but this fell apart a few releases ago and was just reported recently. The other is just a minor dependency clean up. I think queued up right now by Andrew is a fix in percpu that papers of what seems to be a bug in hotplug for a special situation with memoryless nodes. Michal Hocko is digging into it further. [1] https://lore.kernel.org/linux-mm/908909e0-4815-b580-7ff5-d824d36a141c@xxxxxxxxxx/T/ Thanks, Dennis The following changes since commit 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1: Linux 5.16-rc4 (2021-12-05 14:08:22 -0800) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git for-5.16-fixes for you to fetch changes up to a4f1192cb53758a7210ed5a9ee695aeba22f75fb: percpu_ref: Replace kernel.h with the necessary inclusions (2021-12-09 15:41:09 -0500) ---------------------------------------------------------------- Andy Shevchenko (1): percpu_ref: Replace kernel.h with the necessary inclusions Vladimir Murzin (1): percpu: km: ensure it is used with NOMMU (either UP or SMP) include/linux/percpu-refcount.h | 2 +- mm/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index b31d3f3312ce..d73a1c08c3e3 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -51,9 +51,9 @@ #define _LINUX_PERCPU_REFCOUNT_H #include <linux/atomic.h> -#include <linux/kernel.h> #include <linux/percpu.h> #include <linux/rcupdate.h> +#include <linux/types.h> #include <linux/gfp.h> struct percpu_ref; diff --git a/mm/Kconfig b/mm/Kconfig index 28edafc820ad..356f4f2c779e 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -428,7 +428,7 @@ config THP_SWAP # UP and nommu archs use km based percpu allocator # config NEED_PER_CPU_KM - depends on !SMP + depends on !SMP || !MMU bool default y
