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| author | Tony Luck <tony.luck@intel.com> | 2015-11-10 21:09:47 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-11 01:44:26 +0300 |
| commit | b0aeba741b2d082e4f0773881af4906ce2bb8231 (patch) | |
| tree | 54aa8f78967e60d869d4502ab4554aae4676d6b9 /mm | |
| parent | 3934bbc0446e4cae977a6efe82ce993d37434e53 (diff) | |
| download | linux-b0aeba741b2d082e4f0773881af4906ce2bb8231.tar.xz | |
Fix alloc_node_mem_map() to work on ia64 again
In commit a1c34a3bf00a ("mm: Don't offset memmap for flatmem") Laura
fixed a problem for Srinivas relating to the bottom 2MB of RAM on an ARM
IFC6410 board.
One small wrinkle on ia64 is that it allocates the node_mem_map earlier
in arch code, so it skips the block of code where "offset" is
initialized.
Move initialization of start and offset before the check for the
node_mem_map so that they will always be available in the latter part of
the function.
Tested-by: Laura Abbott <laura@labbott.name>
Fixes: a1c34a3bf00a (mm: Don't offset memmap for flatmem)
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 208e4c7e771b..17a3c66639a9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5266,6 +5266,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat) { + unsigned long __maybe_unused start = 0; unsigned long __maybe_unused offset = 0; /* Skip empty nodes */ @@ -5273,9 +5274,11 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat) return; #ifdef CONFIG_FLAT_NODE_MEM_MAP + start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1); + offset = pgdat->node_start_pfn - start; /* ia64 gets its own node_mem_map, before this, without bootmem */ if (!pgdat->node_mem_map) { - unsigned long size, start, end; + unsigned long size, end; struct page *map; /* @@ -5283,8 +5286,6 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat) * aligned but the node_mem_map endpoints must be in order * for the buddy allocator to function correctly. */ - start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1); - offset = pgdat->node_start_pfn - start; end = pgdat_end_pfn(pgdat); end = ALIGN(end, MAX_ORDER_NR_PAGES); size = (end - start) * sizeof(struct page); |