KVM: add missing memory barrier in kvm_{make,check}_request

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kvm_make_request and kvm_check_request imply a producer-consumer
relationship; add implicit memory barriers to them.  There was indeed
already a place that was adding an explicit smp_mb() to order between
kvm_check_request and the processing of the request.  That memory
barrier can be removed (as an added benefit, kvm_check_request can use
smp_mb__after_atomic which is free on x86).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2016-03-10 16:30:22 +01:00 • committed by Radim Krčmář

parent 46971a2f59

commit 2e4682ba2e

2 changed files with 11 additions and 3 deletions

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3

arch/x86/kvm/irq_comm.c

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11

include/linux/kvm_host.h

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