tree: git://git.cmpxchg.org/linux-mmotm.git master
head: 8f1fc64dc9b39fedb7390e086001ce5ec327e80d
commit: 0bba74d83e98573d20b6039aad5f7fdf08a7618a [80/287] memory-hotplug: fix not enough check of valid zones
config: make ARCH=x86_64 allmodconfig
All warnings:
drivers/base/memory.c: In function 'show_zones_online_to':
>> drivers/base/memory.c:384:22: warning: unused variable 'zone_prev' [-Wunused-variable]
struct zone *zone, *zone_prev;
^
vim +/zone_prev +384 drivers/base/memory.c
3947be19 Dave Hansen 2005-10-29 368 */
10fbcf4c Kay Sievers 2011-12-21 369 static ssize_t show_phys_device(struct device *dev,
10fbcf4c Kay Sievers 2011-12-21 370 struct device_attribute *attr, char *buf)
3947be19 Dave Hansen 2005-10-29 371 {
7315f0cc Gu Zheng 2013-08-28 372 struct memory_block *mem = to_memory_block(dev);
3947be19 Dave Hansen 2005-10-29 373 return sprintf(buf, "%d\n", mem->phys_device);
3947be19 Dave Hansen 2005-10-29 374 }
3947be19 Dave Hansen 2005-10-29 375
2a71168c Andrew Morton 2014-08-29 376 #ifdef CONFIG_MEMORY_HOTREMOVE
473972f2 Zhang Zhen 2014-08-29 377 static ssize_t show_zones_online_to(struct device *dev,
473972f2 Zhang Zhen 2014-08-29 378 struct device_attribute *attr, char *buf)
473972f2 Zhang Zhen 2014-08-29 379 {
473972f2 Zhang Zhen 2014-08-29 380 struct memory_block *mem = to_memory_block(dev);
473972f2 Zhang Zhen 2014-08-29 381 unsigned long start_pfn, end_pfn;
473972f2 Zhang Zhen 2014-08-29 382 unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
473972f2 Zhang Zhen 2014-08-29 383 struct page *first_page;
473972f2 Zhang Zhen 2014-08-29 @384 struct zone *zone, *zone_prev;
473972f2 Zhang Zhen 2014-08-29 385
473972f2 Zhang Zhen 2014-08-29 386 start_pfn = section_nr_to_pfn(mem->start_section_nr);
473972f2 Zhang Zhen 2014-08-29 387 end_pfn = start_pfn + nr_pages;
473972f2 Zhang Zhen 2014-08-29 388 first_page = pfn_to_page(start_pfn);
473972f2 Zhang Zhen 2014-08-29 389
473972f2 Zhang Zhen 2014-08-29 390 /* The block contains more than one zone can not be offlined. */
473972f2 Zhang Zhen 2014-08-29 391 if (!test_pages_in_a_zone(start_pfn, end_pfn))
473972f2 Zhang Zhen 2014-08-29 392 return sprintf(buf, "none\n");
:::::: The code at line 384 was first introduced by commit
:::::: 473972f2929d9640156f9e000a204a8ece7ecd61 memory-hotplug: add sysfs valid_zones attribute
:::::: TO: Zhang Zhen <zhenzhang.zhang@xxxxxxxxxx>
:::::: CC: Johannes Weiner <hannes@xxxxxxxxxxx>
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