diff options
author | Paul Mackerras <paulus@samba.org> | 2014-06-30 20:51:09 +1000 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-08-05 14:24:23 +0200 |
commit | 56f89f3629ffd1a21d38c3d0bea23deac0e284ce (patch) | |
tree | f92eaa71d30a8d5c86356952294e3287b4de9094 /include/linux/proportions.h | |
parent | 478d66862559bade81cb653af52b9aa53bee2c8a (diff) |
KVM: Don't keep reference to irq routing table in irqfd struct
This makes the irqfd code keep a copy of the irq routing table entry
for each irqfd, rather than a reference to the copy in the actual
irq routing table maintained in kvm/virt/irqchip.c. This will enable
us to change the routing table structure in future, or even not have a
routing table at all on some platforms.
The synchronization that was previously achieved using srcu_dereference
on the read side is now achieved using a seqcount_t structure. That
ensures that we don't get a halfway-updated copy of the structure if
we read it while another thread is updating it.
We still use srcu_read_lock/unlock around the read side so that when
changing the routing table we can be sure that after calling
synchronize_srcu, nothing will be using the old routing.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/linux/proportions.h')
0 files changed, 0 insertions, 0 deletions