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-rw-r--r--include/asm-frv/mmu.h1
-rw-r--r--include/asm-m32r/mmu.h1
-rw-r--r--include/linux/mm.h18
-rw-r--r--include/linux/mm_types.h18
4 files changed, 23 insertions, 15 deletions
diff --git a/include/asm-frv/mmu.h b/include/asm-frv/mmu.h
index 22c0371..86ca0e8 100644
--- a/include/asm-frv/mmu.h
+++ b/include/asm-frv/mmu.h
@@ -22,7 +22,6 @@ typedef struct {
unsigned long dtlb_ptd_mapping; /* [DAMR5] PTD mapping for dtlb cached PGE */
#else
- struct vm_list_struct *vmlist;
unsigned long end_brk;
#endif
diff --git a/include/asm-m32r/mmu.h b/include/asm-m32r/mmu.h
index d9bd724..150cb92 100644
--- a/include/asm-m32r/mmu.h
+++ b/include/asm-m32r/mmu.h
@@ -4,7 +4,6 @@
#if !defined(CONFIG_MMU)
typedef struct {
- struct vm_list_struct *vmlist;
unsigned long end_brk;
} mm_context_t;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4a3d28c..b91a73f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -56,19 +56,9 @@ extern unsigned long mmap_min_addr;
extern struct kmem_cache *vm_area_cachep;
-/*
- * This struct defines the per-mm list of VMAs for uClinux. If CONFIG_MMU is
- * disabled, then there's a single shared list of VMAs maintained by the
- * system, and mm's subscribe to these individually
- */
-struct vm_list_struct {
- struct vm_list_struct *next;
- struct vm_area_struct *vma;
-};
-
#ifndef CONFIG_MMU
-extern struct rb_root nommu_vma_tree;
-extern struct rw_semaphore nommu_vma_sem;
+extern struct rb_root nommu_region_tree;
+extern struct rw_semaphore nommu_region_sem;
extern unsigned int kobjsize(const void *objp);
#endif
@@ -1061,6 +1051,7 @@ extern void memmap_init_zone(unsigned long, int, unsigned long,
unsigned long, enum memmap_context);
extern void setup_per_zone_pages_min(void);
extern void mem_init(void);
+extern void __init mmap_init(void);
extern void show_mem(void);
extern void si_meminfo(struct sysinfo * val);
extern void si_meminfo_node(struct sysinfo *val, int nid);
@@ -1072,6 +1063,9 @@ extern void setup_per_cpu_pageset(void);
static inline void setup_per_cpu_pageset(void) {}
#endif
+/* nommu.c */
+extern atomic_t mmap_pages_allocated;
+
/* prio_tree.c */
void vma_prio_tree_add(struct vm_area_struct *, struct vm_area_struct *old);
void vma_prio_tree_insert(struct vm_area_struct *, struct prio_tree_root *);
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 9cfc9b6..1c1e0d3 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -97,6 +97,22 @@ struct page {
};
/*
+ * 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
+ * map parts of them.
+ */
+struct vm_region {
+ struct rb_node vm_rb; /* link in global region tree */
+ unsigned long vm_flags; /* VMA vm_flags */
+ unsigned long vm_start; /* start address of region */
+ unsigned long vm_end; /* region initialised to here */
+ unsigned long vm_pgoff; /* the offset in vm_file corresponding to vm_start */
+ struct file *vm_file; /* the backing file or NULL */
+
+ atomic_t vm_usage; /* region usage count */
+};
+
+/*
* This struct defines a memory VMM memory area. There is one of these
* per VM-area/task. A VM area is any part of the process virtual memory
* space that has a special rule for the page-fault handlers (ie a shared
@@ -152,7 +168,7 @@ struct vm_area_struct {
unsigned long vm_truncate_count;/* truncate_count or restart_addr */
#ifndef CONFIG_MMU
- atomic_t vm_usage; /* refcount (VMAs shared if !MMU) */
+ struct vm_region *vm_region; /* NOMMU mapping region */
#endif
#ifdef CONFIG_NUMA
struct mempolicy *vm_policy; /* NUMA policy for the VMA */
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