Fix min_low_pfn/max_low_pfn build errors on ia64 and microblaze

Hi Linus,

The following changes since commit f75aef392f869018f78cfedf3c320a6b3fcfda6b:

Linux 5.9-rc3 (2020-08-30 16:01:54 -0700)

are available in the Git repository at:

https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git tags/fixes-2020-09-03

for you to fetch changes up to 5f7b81c18366c38446f6eedab570b98dbdc07cff:

ia64: fix min_low_pfn/max_low_pfn build errors (2020-09-01 19:34:11 +0300)

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Fix min_low_pfn/max_low_pfn build errors on ia64 and microblaze

Some configurations of ia64 and microblaze use min_low_pfn and max_low_pfn in pfn_valid(). This causes build failures for modules that use pfn_valid().

The fix is to add EXPORT_SYMBOL() for these variables on ia64 and microblaze.

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Randy Dunlap (2):
microblaze: fix min_low_pfn/max_low_pfn build errors
ia64: fix min_low_pfn/max_low_pfn build errors

 arch/ia64/kernel/ia64_ksyms.c | 2 +-
 arch/microblaze/mm/init.c     | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

Sincerely yours,
Mike.