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exec.c: Use atomic_rcu_read() to access dispatch in memory_region_section_get_iotlb()

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When accessing the dispatch pointer in an AddressSpace within an RCU
critical section we should always use atomic_rcu_read(). Fix an
access within memory_region_section_get_iotlb() which was incorrectly
doing a direct pointer access.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <1437391637-31576-1-git-send-email-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Maydell 2015-07-20 12:27:16 +01:00 committed by Paolo Bonzini
parent dc94bd9166
commit 0b8e2c1002
1 changed files with 4 additions and 1 deletions
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exec.c
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@ -954,7 +954,10 @@ hwaddr memory_region_section_get_iotlb(CPUState *cpu,
iotlb |= PHYS_SECTION_ROM;
}
} else {
iotlb = section - section->address_space->dispatch->map.sections;
AddressSpaceDispatch *d;
d = atomic_rcu_read(&section->address_space->dispatch);
iotlb = section - d->map.sections;
iotlb += xlat;
}