This function it the same as __vmalloc_node_range() but returns pointer to
vm_struct rather than virtual address.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
---
include/linux/vmalloc.h | 5 +++++
mm/vmalloc.c | 39 +++++++++++++++++++++++++++++++++++----
2 files changed, 40 insertions(+), 4 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 1e5d8c392f15..f772346a506e 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -81,6 +81,11 @@ extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller);
+extern struct vm_struct *__vmalloc_area(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end,
+ gfp_t gfp_mask, pgprot_t prot,
+ unsigned long vm_flags, int node,
+ const void *caller);
#ifndef CONFIG_MMU
extern void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags);
static inline void *__vmalloc_node_flags_caller(unsigned long size, int node,
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index cece3fb33cef..ad962be74d53 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1725,7 +1725,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
}
/**
- * __vmalloc_node_range - allocate virtually contiguous memory
+ * __vmalloc_area - allocate virtually contiguous memory
* @size: allocation size
* @align: desired alignment
* @start: vm area range start
@@ -1738,9 +1738,11 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
*
* Allocate enough pages to cover @size from the page level
* allocator with @gfp_mask flags. Map them into contiguous
- * kernel virtual space, using a pagetable protection of @prot.
+ * kernel virtual space, using a pagetable protection of @prot
+ *
+ * Returns the area descriptor on success or %NULL on failure.
*/
-void *__vmalloc_node_range(unsigned long size, unsigned long align,
+struct vm_struct *__vmalloc_area(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller)
@@ -1771,7 +1773,7 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
kmemleak_vmalloc(area, size, gfp_mask);
- return addr;
+ return area;
fail:
warn_alloc(gfp_mask, NULL,
@@ -1780,6 +1782,35 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
}
/**
+ * __vmalloc_node_range - allocate virtually contiguous memory
+ * @size: allocation size
+ * @align: desired alignment
+ * @start: vm area range start
+ * @end: vm area range end
+ * @gfp_mask: flags for the page level allocator
+ * @prot: protection mask for the allocated pages
+ * @vm_flags: additional vm area flags (e.g. %VM_NO_GUARD)
+ * @node: node to use for allocation or NUMA_NO_NODE
+ * @caller: caller's return address
+ *
+ * Allocate enough pages to cover @size from the page level
+ * allocator with @gfp_mask flags. Map them into contiguous
+ * kernel virtual space, using a pagetable protection of @prot.
+ */
+void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ const void *caller)
+{
+ struct vm_struct *area;
+
+ area = __vmalloc_area(size, align, start, end, gfp_mask,
+ prot, vm_flags, node, caller);
+
+ return area ? area->addr : NULL;
+}
+
+/**
* __vmalloc_node - allocate virtually contiguous memory
* @size: allocation size
* @align: desired alignment
--
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