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mm: remove CONFIG_DISCONTIGMEM

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There are no architectures that support DISCONTIGMEM left.

Remove the configuration option and the dead code it was guarding in the
generic memory management code.

Link: https://lkml.kernel.org/r/20210608091316.3622-6-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2021-06-28 19:42:52 -07:00 • committed by Linus Torvalds
parent 5ab06e1099
commit bb1c50d396
4 changed files with 12 additions and 71 deletions
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8
include/linux/mmzone.h
View file

@ -749,10 +749,12 @@ struct zonelist {
struct zoneref _zonerefs[MAX_ZONES_PER_ZONELIST + 1];
};
#ifndef CONFIG_DISCONTIGMEM
/* The array of struct pages - for discontigmem use pgdat->lmem_map */
/*
* The array of struct pages for flatmem.
* It must be declared for SPARSEMEM as well because there are configurations
* that rely on that.
*/
extern struct page *mem_map;
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct deferred_split {