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![]() Some of the boot code in init_kernel_freeable() which runs before SMP bringup assumes (rightfully) that it runs on the boot CPU and therefore can use smp_processor_id() in preemptible context. That works so far because the smp_processor_id() check starts to be effective after smp bringup. That's just wrong. Starting with SMP bringup and the ability to move threads around, smp_processor_id() in preemptible context is broken. Aside of that it does not make sense to allow init to run on all CPUs before sched_smp_init() has been run. Pin the init to the boot CPU so the existing code can continue to use smp_processor_id() without triggering the checks when the enabling of those checks starts earlier. Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20170516184734.943149935@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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calibrate.c | ||
do_mounts.c | ||
do_mounts.h | ||
do_mounts_initrd.c | ||
do_mounts_md.c | ||
do_mounts_rd.c | ||
init_task.c | ||
initramfs.c | ||
Kconfig | ||
main.c | ||
Makefile | ||
noinitramfs.c | ||
version.c |