On Tue, Jun 18, 2019 at 10:31:40PM +0200, Thomas Gleixner wrote:
> A recent change moved the microcode loader hotplug callback into the early
> startup phase, which is running with interrupts disabled. It missed that
> the callbacks invoke sysfs functions which might sleep causing nice 'might
> sleep' splats with proper debugging enabled.
>
> Split the callbacks and only load the microcode in the early startup phase
> and move the sysfs handling back into the later threaded and preemptible
> bringup phase where it was before.
>
> Fixes: 78f4e932f776 ("x86/microcode, cpuhotplug: Add a microcode loader CPU
> hotplug callback")
> Signed-off-by: Thomas Gleixner <[email protected]>
> Cc: [email protected]
> ---
> arch/x86/kernel/cpu/microcode/core.c | 15 ++++++++++-----
> 1 file changed, 10 insertions(+), 5 deletions(-)
Acked-by: Borislav Petkov <[email protected]>
Thanks for fixing that!
--
Regards/Gruss,
Boris.
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