On Thu, 2015-11-12 at 09:53 -0800, Dan Williams wrote:
> Rather than punt on the numa node for these e820 ranges try to find a
> better answer with memory_add_physaddr_to_nid() when it is available.
>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Reported-by: Boaz Harrosh <boaz@xxxxxxxxxxxxx>
> Tested-by: Boaz Harrosh <boaz@xxxxxxxxxxxxx>
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> ---
> Only change from the original version is a compile fix for the
> CONFIG_MEMORY_HOTPLUG=n case.
>
> drivers/nvdimm/e820.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/nvdimm/e820.c b/drivers/nvdimm/e820.c
> index 8282db2ef99e..b0045a505dc8 100644
> --- a/drivers/nvdimm/e820.c
> +++ b/drivers/nvdimm/e820.c
> @@ -3,6 +3,7 @@
> * Copyright (c) 2015, Intel Corporation.
> */
> #include <linux/platform_device.h>
> +#include <linux/memory_hotplug.h>
> #include <linux/libnvdimm.h>
> #include <linux/module.h>
>
> @@ -25,6 +26,18 @@ static int e820_pmem_remove(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_MEMORY_HOTPLUG
> +static int e820_range_to_nid(resource_size_t addr)
> +{
> + return memory_add_physaddr_to_nid(addr);
> +}
> +#else
> +static int e820_range_to_nid(resource_size_t addr)
> +{
> + return NUMA_NO_NODE;
> +}
> +#endif
"linux/memory_hotplug.h" defines as follows.
#ifdef CONFIG_NUMA
extern int memory_add_physaddr_to_nid(u64 start);
#else
static inline int memory_add_physaddr_to_nid(u64 start)
{
return 0;
}
#endif
So, memory_add_physaddr_to_nid() should be defined with #ifdef CONFIG_NUMA.
#ifdef CONFIG_MEMORY_HOTPLUG
int memory_add_physaddr_to_nid(u64 start)
{
Thanks,
-Toshi
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