[PATCH] MM: Make "struct vm_region {...}" depend on !CONFIG_MMU.

[PATCH] MM: Make "struct vm_region {...}" depend on !CONFIG_MMU.

[Robert P. J. Day]

Since the "vm_region" structure appears to be relevant only under
NOMMU, conditionally include it in mm_types.h.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>

---

  if i read mm_types.h, i can see the obvious conditional inclusion:

#ifndef CONFIG_MMU
        struct vm_region *vm_region;    /* NOMMU mapping region */
#endif

since that's the case, it seems only consistent to make the structure
declaration itself similarly conditional, no?

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index b8bb9a6..76f1174 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -102,6 +102,7 @@ struct page {
 #endif
 };

+#ifndef CONFIG_MMU
 /*
  * A region containing a mapping of a non-memory backed file under NOMMU
  * conditions.  These are held in a global tree and are pinned by the VMAs that
@@ -120,6 +121,7 @@ struct vm_region {
 	bool		vm_icache_flushed : 1; /* true if the icache has been flushed for
 						* this region */
 };
+#endif

 /*
  * This struct defines a memory VMM memory area. There is one of these


========================================================================
Robert P. J. Day                               Waterloo, Ontario, CANADA

            Linux Consulting, Training and Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
========================================================================

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