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Revert "mm: Check if section present during memory block (un)registering"

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This reverts commit 7568fb63f5 as it's
already in Linus's tree through a different patch.

Reported-by: Tony Luck <tony.luck@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: stable@vger.kernel.org #v3.15
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2015-10-13 10:57:25 -07:00
parent dbe2256ddd
commit 8346aa765e
1 changed files with 4 additions and 27 deletions
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31
drivers/base/node.c
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@ -390,18 +390,7 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid)
sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
sect_end_pfn += PAGES_PER_SECTION - 1;
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int page_nid, scn_nr;
/*
* memory block could have several absent sections from start.
* skip pfn range from absent section
*/
scn_nr = pfn_to_section_nr(pfn);
if (!present_section_nr(scn_nr)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
PAGES_PER_SECTION) - 1;
continue;
}
int page_nid;
/*
* memory block could have several absent sections from start.
@ -447,22 +436,10 @@ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
return -ENOMEM;
nodes_clear(*unlinked_nodes);
sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
sect_end_pfn += PAGES_PER_SECTION - 1;
sect_start_pfn = section_nr_to_pfn(phys_index);
sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1;
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int nid, scn_nr;
/*
* memory block could have several absent sections from start.
* skip pfn range from absent section
*/
scn_nr = pfn_to_section_nr(pfn);
if (!present_section_nr(scn_nr)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
PAGES_PER_SECTION) - 1;
continue;
}
int nid;
nid = get_nid_for_pfn(pfn);
if (nid < 0)