| Message ID | 1337252085-22039-3-git-send-email-m.szyprowski@samsung.com |
|---|---|
| State | New |
| Headers | show |
On 05/17/2012 07:54 PM, Marek Szyprowski wrote: > find_vm_area() function is usefull for other core subsystems (like > dma-mapping) to get access to vm_area internals. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> We can't know how you want to use this function. It would be better to fold this patch into [4/4]. > --- > include/linux/vmalloc.h | 1 + > mm/vmalloc.c | 10 +++++++++- > 2 files changed, 10 insertions(+), 1 deletion(-) > > diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h > index 2e28f4d..6071e91 100644 > --- a/include/linux/vmalloc.h > +++ b/include/linux/vmalloc.h > @@ -93,6 +93,7 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size, > unsigned long start, unsigned long end, > const void *caller); > extern struct vm_struct *remove_vm_area(const void *addr); > +extern struct vm_struct *find_vm_area(const void *addr); > > extern int map_vm_area(struct vm_struct *area, pgprot_t prot, > struct page ***pages); > diff --git a/mm/vmalloc.c b/mm/vmalloc.c > index 8bc7f3ef..8cb7f22 100644 > --- a/mm/vmalloc.c > +++ b/mm/vmalloc.c > @@ -1402,7 +1402,15 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags, > -1, GFP_KERNEL, caller); > } > > -static struct vm_struct *find_vm_area(const void *addr) > +/** > + * find_vm_area - find a continuous kernel virtual area > + * @addr: base address > + * > + * Search for the kernel VM area starting at @addr, and return it. > + * It is up to the caller to do all required locking to keep the returned > + * pointer valid. > + */ > +struct vm_struct *find_vm_area(const void *addr) > { > struct vmap_area *va; >
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 2e28f4d..6071e91 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -93,6 +93,7 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long start, unsigned long end, const void *caller); extern struct vm_struct *remove_vm_area(const void *addr); +extern struct vm_struct *find_vm_area(const void *addr); extern int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 8bc7f3ef..8cb7f22 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1402,7 +1402,15 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags, -1, GFP_KERNEL, caller); } -static struct vm_struct *find_vm_area(const void *addr) +/** + * find_vm_area - find a continuous kernel virtual area + * @addr: base address + * + * Search for the kernel VM area starting at @addr, and return it. + * It is up to the caller to do all required locking to keep the returned + * pointer valid. + */ +struct vm_struct *find_vm_area(const void *addr) { struct vmap_area *va;