[PATCH] mm: introduce remap_vmalloc_range()

Add remap_vmalloc_range, vmalloc_user, and vmalloc_32_user so that drivers
can have a nice interface for remapping vmalloc memory.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 1d5577b2b752..f6024ab4eff0 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -4,10 +4,13 @@
 #include <linux/spinlock.h>
 #include <asm/page.h>           /* pgprot_t */
 
+struct vm_area_struct;
+
 /* bits in vm_struct->flags */
 #define VM_IOREMAP      0x00000001      /* ioremap() and friends */
 #define VM_ALLOC        0x00000002      /* vmalloc() */
 #define VM_MAP          0x00000004      /* vmap()ed pages */
+#define VM_USERMAP      0x00000008      /* suitable for remap_vmalloc_range */
 /* bits [20..32] reserved for arch specific ioremap internals */
 
 /*
@@ -32,9 +35,11 @@ struct vm_struct {
  *      Highlevel APIs for driver use
  */
 extern void *vmalloc(unsigned long size);
+extern void *vmalloc_user(unsigned long size);
 extern void *vmalloc_node(unsigned long size, int node);
 extern void *vmalloc_exec(unsigned long size);
 extern void *vmalloc_32(unsigned long size);
+extern void *vmalloc_32_user(unsigned long size);
 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
                                 pgprot_t prot);
@@ -45,6 +50,9 @@ extern void vfree(void *addr);
 extern void *vmap(struct page **pages, unsigned int count,
                         unsigned long flags, pgprot_t prot);
 extern void vunmap(void *addr);
+
+extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
+                                                        unsigned long pgoff);
  
 /*
  *      Lowlevel-APIs (not for driver use!)