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-rw-r--r--include/linux/vmalloc.h34
1 files changed, 32 insertions, 2 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 6071e911c7f..7d5773a99f2 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -3,7 +3,9 @@
#include <linux/spinlock.h>
#include <linux/init.h>
+#include <linux/list.h>
#include <asm/page.h> /* pgprot_t */
+#include <linux/rbtree.h>
struct vm_area_struct; /* vma defining user mapping in mm_types.h */
@@ -35,6 +37,17 @@ struct vm_struct {
const void *caller;
};
+struct vmap_area {
+ unsigned long va_start;
+ unsigned long va_end;
+ unsigned long flags;
+ struct rb_node rb_node; /* address sorted rbtree */
+ struct list_head list; /* address sorted list */
+ struct list_head purge_list; /* "lazy purge" list */
+ struct vm_struct *vm;
+ struct rcu_head rcu_head;
+};
+
/*
* Highlevel APIs for driver use
*/
@@ -130,8 +143,7 @@ extern long vwrite(char *buf, char *addr, unsigned long count);
/*
* Internals. Dont't use..
*/
-extern rwlock_t vmlist_lock;
-extern struct vm_struct *vmlist;
+extern struct list_head vmap_area_list;
extern __init void vm_area_add_early(struct vm_struct *vm);
extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
@@ -158,4 +170,22 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
# endif
#endif
+struct vmalloc_info {
+ unsigned long used;
+ unsigned long largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi) \
+do { \
+ (vmi)->used = 0; \
+ (vmi)->largest_chunk = 0; \
+} while (0)
+#endif
+
#endif /* _LINUX_VMALLOC_H */