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SubjectRe: [PATCH 1/2] libnvdimm, pmem: fix 'pfn' support for section-misaligned namespaces
Hi Dan,

[auto build test WARNING on v4.5-rc6]
[also build test WARNING on next-20160229]
[cannot apply to linux-nvdimm/libnvdimm-for-next]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url: https://github.com/0day-ci/linux/commits/Dan-Williams/devm_memremap_pages-vs-section-misaligned-pmem/20160301-105936
config: i386-randconfig-x007-201609 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All warnings (new ones prefixed by >>):

drivers/nvdimm/pmem.c: In function 'init_altmap_reserve':
>> drivers/nvdimm/pmem.c:375:16: warning: unused variable 'base_pfn' [-Wunused-variable]
unsigned long base_pfn = __phys_to_pfn(base);
^

vim +/base_pfn +375 drivers/nvdimm/pmem.c

359 /*
360 * We hotplug memory at section granularity, pad the reserved area from
361 * the previous section base to the namespace base address.
362 */
363 static unsigned long init_altmap_base(resource_size_t base)
364 {
365 unsigned long base_pfn = __phys_to_pfn(base);
366
367 #ifdef CONFIG_SPARSEMEM
368 base_pfn = SECTION_ALIGN_DOWN(base_pfn);
369 #endif
370 return base_pfn;
371 }
372
373 static unsigned long init_altmap_reserve(resource_size_t base)
374 {
> 375 unsigned long base_pfn = __phys_to_pfn(base);
376 unsigned long reserve = __phys_to_pfn(SZ_8K);
377
378 #ifdef CONFIG_SPARSEMEM
379 reserve += base_pfn - SECTION_ALIGN_DOWN(base_pfn);
380 #endif
381 return reserve;
382 }
383

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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