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mm,x86: fix kmap_atomic_push vs ioremap_32.c

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It appears i386 uses kmap_atomic infrastructure regardless of
CONFIG_HIGHMEM which results in a compile error when highmem is disabled.

Cure this by providing the needed few bits for both CONFIG_HIGHMEM and
CONFIG_X86_32.

Signed-off-by: Peter Zijlstra <[email protected]>
Reported-by: Chris Wilson <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Peter Zijlstra 2010-10-27 15:32:57 -07:00 • committed by Linus Torvalds
commit a8e23a2918
2 changed files with 30 additions and 22 deletions
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6
mm/highmem.c
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@ -29,6 +29,11 @@
#include <linux/kgdb.h>
#include <asm/tlbflush.h>
#if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32)
DEFINE_PER_CPU(int, __kmap_atomic_idx);
#endif
/*
* Virtual_count is not a pure "count".
* 0 means that it is not mapped, and has not been mapped
@ -43,7 +48,6 @@ unsigned long totalhigh_pages __read_mostly;
EXPORT_SYMBOL(totalhigh_pages);
DEFINE_PER_CPU(int, __kmap_atomic_idx);
EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx);
unsigned int nr_free_highpages (void)