forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mm: System without MMU do not need pte_mkwrite

Browse source 
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:
Michal Simek 2011-01-21 08:49:56 +01:00 • committed by Linus Torvalds
commit 3dece370ec
1 changed files with 2 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/mm.h
View file

@ -470,6 +470,7 @@ static inline void set_compound_order(struct page *page, unsigned long order)
page[1].lru.prev = (void *)order;
}
#ifdef CONFIG_MMU
/*
* Do pte_mkwrite, but only if the vma says VM_WRITE. We do this when
* servicing faults for write access. In the normal case, do always want
@ -482,6 +483,7 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)
pte = pte_mkwrite(pte);
return pte;
}
#endif
/*
* Multiple processes may "see" the same page. E.g. for untouched