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mm: System without MMU do not need pte_mkwrite
The patch "thp: export maybe_mkwrite" (commit 14fd403f21
) breaks
systems without MMU.
Error log:
CC arch/microblaze/mm/init.o
In file included from include/linux/mman.h:14,
from arch/microblaze/mm/consistent.c:24:
include/linux/mm.h: In function 'maybe_mkwrite':
include/linux/mm.h:482: error: implicit declaration of function 'pte_mkwrite'
include/linux/mm.h:482: error: incompatible types in assignment
Signed-off-by: Michal Simek <monstr@monstr.eu>
CC: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
db9fd8486b
commit
3dece370ec
1 changed files with 2 additions and 0 deletions
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@ -470,6 +470,7 @@ static inline void set_compound_order(struct page *page, unsigned long order)
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page[1].lru.prev = (void *)order;
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}
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#ifdef CONFIG_MMU
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/*
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* Do pte_mkwrite, but only if the vma says VM_WRITE. We do this when
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* servicing faults for write access. In the normal case, do always want
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@ -482,6 +483,7 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)
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pte = pte_mkwrite(pte);
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return pte;
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}
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#endif
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/*
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* Multiple processes may "see" the same page. E.g. for untouched
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