3.16.52-rc1 review patch. If anyone has any objections, please let me know.
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From: YASUAKI ISHIMATSU yasu.isimatu@gmail.com
commit d09b0137d204bebeaafed672bc5a244e9ac92edb upstream.
find_{smallest|biggest}_section_pfn()s find the smallest/biggest section and return the pfn of the section. But the functions are defined as int. So the functions always return 0x00000000 - 0xffffffff. It means if memory address is over 16TB, the functions does not work correctly.
To handle 64 bit value, the patch defines find_{smallest|biggest}_section_pfn() as unsigned long.
Fixes: 815121d2b5cd ("memory_hotplug: clear zone when removing the memory") Link: http://lkml.kernel.org/r/d9d5593a-d0a4-c4be-ab08-493df59a85c6@gmail.com Signed-off-by: Yasuaki Ishimatsu isimatu.yasuaki@jp.fujitsu.com Acked-by: Michal Hocko mhocko@suse.com Cc: Xishi Qiu qiuxishi@huawei.com Cc: Reza Arbab arbab@linux.vnet.ibm.com Cc: Vlastimil Babka vbabka@suse.cz Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Ben Hutchings ben@decadent.org.uk --- mm/memory_hotplug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -520,7 +520,7 @@ EXPORT_SYMBOL_GPL(__add_pages);
#ifdef CONFIG_MEMORY_HOTREMOVE /* find the smallest valid pfn in the range [start_pfn, end_pfn) */ -static int find_smallest_section_pfn(int nid, struct zone *zone, +static unsigned long find_smallest_section_pfn(int nid, struct zone *zone, unsigned long start_pfn, unsigned long end_pfn) { @@ -545,7 +545,7 @@ static int find_smallest_section_pfn(int }
/* find the biggest valid pfn in the range [start_pfn, end_pfn). */ -static int find_biggest_section_pfn(int nid, struct zone *zone, +static unsigned long find_biggest_section_pfn(int nid, struct zone *zone, unsigned long start_pfn, unsigned long end_pfn) {