ipv4: don't remove /proc/net/rt_acct

[safe/jmp/linux-2.6] / include / linux / io-mapping.h

diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index cbc2f0c..97eb928 100644 (file)
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -49,23 +49,30 @@ static inline struct io_mapping *
 io_mapping_create_wc(resource_size_t base, unsigned long size)
 {
        struct io_mapping *iomap;
-
-       if (!is_io_mapping_possible(base, size))
-               return NULL;
+       pgprot_t prot;
 
        iomap = kmalloc(sizeof(*iomap), GFP_KERNEL);
        if (!iomap)
-               return NULL;
+               goto out_err;
+
+       if (iomap_create_wc(base, size, &prot))
+               goto out_free;
 
        iomap->base = base;
        iomap->size = size;
-       iomap->prot = pgprot_writecombine(__pgprot(__PAGE_KERNEL));
+       iomap->prot = prot;
        return iomap;
+
+out_free:
+       kfree(iomap);
+out_err:
+       return NULL;
 }
 
 static inline void
 io_mapping_free(struct io_mapping *mapping)
 {
+       iomap_free(mapping->base, mapping->size);
        kfree(mapping);
 }
 
@@ -91,8 +98,11 @@ io_mapping_unmap_atomic(void *vaddr)
 static inline void *
 io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
 {
+       resource_size_t phys_addr;
+
        BUG_ON(offset >= mapping->size);
-       resource_size_t phys_addr = mapping->base + offset;
+       phys_addr = mapping->base + offset;
+
        return ioremap_wc(phys_addr, PAGE_SIZE);
 }