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authorAndrea Parri (Microsoft) <parri.andrea@gmail.com>2020-04-06 03:15:14 +0300
committerWei Liu <wei.liu@kernel.org>2020-05-20 12:13:19 +0300
commit7769e18c201aa88eade5556faf9da7f2bc15bb8a (patch)
treec851e261d39bc420dd9d6e7920ccefe02c68e2c4 /include/linux/hyperv.h
parent7527810573436f00e582d3d5ef2eb3c027c98d7d (diff)
downloadlinux-7769e18c201aa88eade5556faf9da7f2bc15bb8a.tar.xz
scsi: storvsc: Re-init stor_chns when a channel interrupt is re-assigned
For each storvsc_device, storvsc keeps track of the channel target CPUs associated to the device (alloced_cpus) and it uses this information to fill a "cache" (stor_chns) mapping CPU->channel according to a certain heuristic. Update the alloced_cpus mask and the stor_chns array when a channel of the storvsc device is re-assigned to a different CPU. Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: <linux-scsi@vger.kernel.org> Link: https://lore.kernel.org/r/20200406001514.19876-12-parri.andrea@gmail.com Reviewed-by; Long Li <longli@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> [ wei: fix a small issue reported by kbuild test robot <lkp@intel.com> ] Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/linux/hyperv.h')
-rw-r--r--include/linux/hyperv.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index b85d7580f2c1..cd64ab7bb3b7 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -773,6 +773,9 @@ struct vmbus_channel {
void (*onchannel_callback)(void *context);
void *channel_callback_context;
+ void (*change_target_cpu_callback)(struct vmbus_channel *channel,
+ u32 old, u32 new);
+
/*
* Synchronize channel scheduling and channel removal; see the inline
* comments in vmbus_chan_sched() and vmbus_reset_channel_cb().