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mm: export "high_memory" symbol on !MMU

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The symbol 'high_memory' is provided on both MMU- and NOMMU-kernels, but
only one of them is exported, which leads to module build errors in
drivers that work fine built-in:

  ERROR: "high_memory" [drivers/net/virtio_net.ko] undefined!
  ERROR: "high_memory" [drivers/net/ppp/ppp_mppe.ko] undefined!
  ERROR: "high_memory" [drivers/mtd/nand/nand.ko] undefined!
  ERROR: "high_memory" [crypto/tcrypt.ko] undefined!
  ERROR: "high_memory" [crypto/cts.ko] undefined!

This exports the symbol to get these to work on NOMMU as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2015-02-05 12:25:12 -08:00 committed by Linus Torvalds
parent 21d543f225
commit 944b687491
1 changed files with 1 additions and 0 deletions
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mm/nommu.c
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@ -59,6 +59,7 @@
#endif
void *high_memory;
EXPORT_SYMBOL(high_memory);
struct page *mem_map;
unsigned long max_mapnr;
unsigned long highest_memmap_pfn;