diff options
Diffstat (limited to 'drivers/xen/gntdev.c')
| -rw-r--r-- | drivers/xen/gntdev.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 2ef2b61b69df..f3bf8f4e2d6c 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -32,9 +32,11 @@ #include <linux/types.h> #include <linux/uaccess.h> #include <linux/sched.h> +#include <linux/sched/mm.h> #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/highmem.h> +#include <linux/refcount.h> #include <xen/xen.h> #include <xen/grant_table.h> @@ -85,7 +87,7 @@ struct grant_map { int index; int count; int flags; - atomic_t users; + refcount_t users; struct unmap_notify notify; struct ioctl_gntdev_grant_ref *grants; struct gnttab_map_grant_ref *map_ops; @@ -165,7 +167,7 @@ static struct grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count) add->index = 0; add->count = count; - atomic_set(&add->users, 1); + refcount_set(&add->users, 1); return add; @@ -211,7 +213,7 @@ static void gntdev_put_map(struct gntdev_priv *priv, struct grant_map *map) if (!map) return; - if (!atomic_dec_and_test(&map->users)) + if (!refcount_dec_and_test(&map->users)) return; atomic_sub(map->count, &pages_mapped); @@ -399,7 +401,7 @@ static void gntdev_vma_open(struct vm_area_struct *vma) struct grant_map *map = vma->vm_private_data; pr_debug("gntdev_vma_open %p\n", vma); - atomic_inc(&map->users); + refcount_inc(&map->users); } static void gntdev_vma_close(struct vm_area_struct *vma) @@ -1003,7 +1005,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) goto unlock_out; } - atomic_inc(&map->users); + refcount_inc(&map->users); vma->vm_ops = &gntdev_vmops; |