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libnvdimm, pfn, pmem: allocate memmap array in persistent memory

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Use the new vmem_altmap capability to enable the pmem driver to arrange
for a struct page memmap to be established in persistent memory.

[linux@roeck-us.net: mn10300: declare __pfn_to_phys() to fix build error]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Williams
2016-01-15 16:56:26 -08:00
committed by Linus Torvalds
parent 4b94ffdc41
commit d2c0f041e1
4 changed files with 20 additions and 4 deletions
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arch/ia64/include/asm/page.h
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@@ -105,6 +105,7 @@ extern struct page *vmem_map;
#ifdef CONFIG_DISCONTIGMEM
# define page_to_pfn(page) ((unsigned long) (page - vmem_map))
# define pfn_to_page(pfn) (vmem_map + (pfn))
# define __pfn_to_phys(pfn) PFN_PHYS(pfn)
#else
# include <asm-generic/memory_model.h>
#endif