mm: vmalloc: use const void * for caller argument

'const void *' is a safer type for caller function type. This patch
updates all references to caller function type.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index dcdfc2b..2e28f4d 100644 (file)
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -32,7 +32,7 @@ struct vm_struct {
        struct page             **pages;
        unsigned int            nr_pages;
        phys_addr_t             phys_addr;
-       void                    *caller;
+       const void              *caller;
 };
 
 /*
@@ -62,7 +62,7 @@ extern void *vmalloc_32_user(unsigned long size);
 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
 extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
                        unsigned long start, unsigned long end, gfp_t gfp_mask,
-                       pgprot_t prot, int node, void *caller);
+                       pgprot_t prot, int node, const void *caller);
 extern void vfree(const void *addr);
 
 extern void *vmap(struct page **pages, unsigned int count,
@@ -85,13 +85,13 @@ static inline size_t get_vm_area_size(const struct vm_struct *area)
 
 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
 extern struct vm_struct *get_vm_area_caller(unsigned long size,
-                                       unsigned long flags, void *caller);
+                                       unsigned long flags, const void *caller);
 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
                                        unsigned long start, unsigned long end);
 extern struct vm_struct *__get_vm_area_caller(unsigned long size,
                                        unsigned long flags,
                                        unsigned long start, unsigned long end,
-                                       void *caller);
+                                       const void *caller);
 extern struct vm_struct *remove_vm_area(const void *addr);
 
 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 08b39a5..b28eb41 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1281,7 +1281,7 @@ DEFINE_RWLOCK(vmlist_lock);
 struct vm_struct *vmlist;
 
 static void setup_vmalloc_vm(struct vm_struct *vm, struct vmap_area *va,
-                             unsigned long flags, void *caller)
+                             unsigned long flags, const void *caller)
 {
        vm->flags = flags;
        vm->addr = (void *)va->va_start;
@@ -1307,7 +1307,7 @@ static void insert_vmalloc_vmlist(struct vm_struct *vm)
 }
 
 static void insert_vmalloc_vm(struct vm_struct *vm, struct vmap_area *va,
-                             unsigned long flags, void *caller)
+                             unsigned long flags, const void *caller)
 {
        setup_vmalloc_vm(vm, va, flags, caller);
        insert_vmalloc_vmlist(vm);
@@ -1315,7 +1315,7 @@ static void insert_vmalloc_vm(struct vm_struct *vm, struct vmap_area *va,
 
 static struct vm_struct *__get_vm_area_node(unsigned long size,
                unsigned long align, unsigned long flags, unsigned long start,
-               unsigned long end, int node, gfp_t gfp_mask, void *caller)
+               unsigned long end, int node, gfp_t gfp_mask, const void *caller)
 {
        struct vmap_area *va;
        struct vm_struct *area;
@@ -1376,7 +1376,7 @@ EXPORT_SYMBOL_GPL(__get_vm_area);
 
 struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
                                       unsigned long start, unsigned long end,
-                                      void *caller)
+                                      const void *caller)
 {
        return __get_vm_area_node(size, 1, flags, start, end, -1, GFP_KERNEL,
                                  caller);
@@ -1399,7 +1399,7 @@ struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
 EXPORT_SYMBOL_GPL(get_vm_area);
 
 struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
-                               void *caller)
+                               const void *caller)
 {
        return __get_vm_area_node(size, 1, flags, VMALLOC_START, VMALLOC_END,
                                                -1, GFP_KERNEL, caller);
@@ -1570,9 +1570,9 @@ EXPORT_SYMBOL(vmap);
 
 static void *__vmalloc_node(unsigned long size, unsigned long align,
                            gfp_t gfp_mask, pgprot_t prot,
-                           int node, void *caller);
+                           int node, const void *caller);
 static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
-                                pgprot_t prot, int node, void *caller)
+                                pgprot_t prot, int node, const void *caller)
 {
        const int order = 0;
        struct page **pages;
@@ -1645,7 +1645,7 @@ fail:
  */
 void *__vmalloc_node_range(unsigned long size, unsigned long align,
                        unsigned long start, unsigned long end, gfp_t gfp_mask,
-                       pgprot_t prot, int node, void *caller)
+                       pgprot_t prot, int node, const void *caller)
 {
        struct vm_struct *area;
        void *addr;
@@ -1701,7 +1701,7 @@ fail:
  */
 static void *__vmalloc_node(unsigned long size, unsigned long align,
                            gfp_t gfp_mask, pgprot_t prot,
-                           int node, void *caller)
+                           int node, const void *caller)
 {
        return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
                                gfp_mask, prot, node, caller);