Re: [PATCH V2] hyper-v: use GFP_KERNEL for hv_context.hv_numa_map

From: Jia-Ju Bai
Date: Tue Dec 19 2017 - 03:41:22 EST

On 2017/12/19 1:05, Stephen Hemminger wrote:
On Mon, 18 Dec 2017 17:02:52 +0800
Jia-Ju Bai <baijiaju1990@xxxxxxxxx> wrote:

The kzalloc function is called with GFP_ATOMIC.
But according to driver call graph, it is not in atomic context,
namely no spinlock is held nor in an interrupt handler.

This GFP_ATOMIC is unnecessary, and replace with GFP_KERNEL.

Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx>
drivers/hv/hv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 8267439..b0d025a 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -150,7 +150,7 @@ int hv_synic_alloc(void)
int cpu;
hv_context.hv_numa_map = kzalloc(sizeof(struct cpumask) * nr_node_ids,
if (hv_context.hv_numa_map == NULL) {
pr_err("Unable to allocate NUMA map\n");
goto err;
Thanks, for fixing this.
While you are at it; wouldn't it make sense to use kcalloc here?

I think kcalloc can be used here.

Jia-Ju Bai