diff options
| -rw-r--r-- | fs/userfaultfd.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 59dc28047030..e211b99d33c4 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -53,7 +53,7 @@ struct userfaultfd_ctx { /* a refile sequence protected by fault_pending_wqh lock */ struct seqcount refile_seq; /* pseudo fd refcounting */ - atomic_t refcount; + refcount_t refcount; /* userfaultfd syscall flags */ unsigned int flags; /* features requested from the userspace */ @@ -140,8 +140,7 @@ out: */ static void userfaultfd_ctx_get(struct userfaultfd_ctx *ctx) { - if (!atomic_inc_not_zero(&ctx->refcount)) - BUG(); + refcount_inc(&ctx->refcount); } /** @@ -154,7 +153,7 @@ static void userfaultfd_ctx_get(struct userfaultfd_ctx *ctx) */ static void userfaultfd_ctx_put(struct userfaultfd_ctx *ctx) { - if (atomic_dec_and_test(&ctx->refcount)) { + if (refcount_dec_and_test(&ctx->refcount)) { VM_BUG_ON(spin_is_locked(&ctx->fault_pending_wqh.lock)); VM_BUG_ON(waitqueue_active(&ctx->fault_pending_wqh)); VM_BUG_ON(spin_is_locked(&ctx->fault_wqh.lock)); @@ -686,7 +685,7 @@ int dup_userfaultfd(struct vm_area_struct *vma, struct list_head *fcs) return -ENOMEM; } - atomic_set(&ctx->refcount, 1); + refcount_set(&ctx->refcount, 1); ctx->flags = octx->flags; ctx->state = UFFD_STATE_RUNNING; ctx->features = octx->features; @@ -1927,7 +1926,7 @@ SYSCALL_DEFINE1(userfaultfd, int, flags) if (!ctx) return -ENOMEM; - atomic_set(&ctx->refcount, 1); + refcount_set(&ctx->refcount, 1); ctx->flags = flags; ctx->features = 0; ctx->state = UFFD_STATE_WAIT_API; |