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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-12-07 01:16:25 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-06-05 21:16:49 +0100 |
| commit | c5398ac16c168d9a6495cf492be8bcd1a48a8da2 (patch) | |
| tree | 28bf89180251195ee4eace1f6672c331d895b755 /drivers | |
| parent | d1f5156e1d83f6f2f3cc04aed506ca1f2b603b5d (diff) | |
| download | linux-stable-c5398ac16c168d9a6495cf492be8bcd1a48a8da2.tar.gz linux-stable-c5398ac16c168d9a6495cf492be8bcd1a48a8da2.tar.bz2 linux-stable-c5398ac16c168d9a6495cf492be8bcd1a48a8da2.zip | |
hv: allocate synic pages for all present CPUs
commit 421b8f20d3c381b215f988b42428f56fc3b82405 upstream.
It may happen that not all CPUs are online when we do hv_synic_alloc() and
in case more CPUs come online later we may try accessing these allocated
structures.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hv/hv.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 3e4235c7a47f..1010eae3a7c8 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -264,7 +264,7 @@ int hv_synic_alloc(void) size_t size = sizeof(struct tasklet_struct); int cpu; - for_each_online_cpu(cpu) { + for_each_present_cpu(cpu) { hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); if (hv_context.event_dpc[cpu] == NULL) { pr_err("Unable to allocate event dpc\n"); @@ -317,7 +317,7 @@ void hv_synic_free(void) { int cpu; - for_each_online_cpu(cpu) + for_each_present_cpu(cpu) hv_synic_free_cpu(cpu); } |