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(parent: d71ba78) | patch
KVM: x86: remove unnecessary memory barriers for shared MSRs
authorPaolo Bonzini <pbonzini@redhat.com>
Wed, 29 Jul 2015 09:06:34 +0000 (11:06 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 29 Jul 2015 12:27:23 +0000 (14:27 +0200)
commitc847fe8895fded71d0b9a0ba58d3828320fd1824
tree8a2e5f7f5cf0300c3cea056c782884cfae72bde0tree | snapshot (tar.gz zip)
parentd71ba788345c2b5646101766e0c52714a9b5ed7fcommit | diff
KVM: x86: remove unnecessary memory barriers for shared MSRs

There is no smp_rmb matching the smp_wmb.  shared_msr_update is called from
hardware_enable, which in turn is called via on_each_cpu.  on_each_cpu
and must imply a read memory barrier (on x86 the rmb is achieved simply
through asm volatile in native_apic_mem_write).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c diff | blob | blame | history