Messages in this thread Patch in this message | | | From | Mike Rapoport <> | Subject | [PATCH 1/5] uffd: Split the find_userfault() routine | Date | Sun, 20 Mar 2016 14:42:17 +0200 |
| |
From: Pavel Emelyanov <xemul@parallels.com>
I will need one to lookup for userfaultfd_wait_queue-s in different wait queue
Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Mike Rapoport <rapoport@il.ibm.com> --- fs/userfaultfd.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 66cdb44..4f0b53d 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -483,25 +483,30 @@ static int userfaultfd_release(struct inode *inode, struct file *file) } /* fault_pending_wqh.lock must be hold by the caller */ -static inline struct userfaultfd_wait_queue *find_userfault( - struct userfaultfd_ctx *ctx) +static inline struct userfaultfd_wait_queue *find_userfault_in( + wait_queue_head_t *wqh) { wait_queue_t *wq; struct userfaultfd_wait_queue *uwq; - VM_BUG_ON(!spin_is_locked(&ctx->fault_pending_wqh.lock)); + VM_BUG_ON(!spin_is_locked(&wqh->lock)); uwq = NULL; - if (!waitqueue_active(&ctx->fault_pending_wqh)) + if (!waitqueue_active(wqh)) goto out; /* walk in reverse to provide FIFO behavior to read userfaults */ - wq = list_last_entry(&ctx->fault_pending_wqh.task_list, - typeof(*wq), task_list); + wq = list_last_entry(&wqh->task_list, typeof(*wq), task_list); uwq = container_of(wq, struct userfaultfd_wait_queue, wq); out: return uwq; } +static inline struct userfaultfd_wait_queue *find_userfault( + struct userfaultfd_ctx *ctx) +{ + return find_userfault_in(&ctx->fault_pending_wqh); +} + static unsigned int userfaultfd_poll(struct file *file, poll_table *wait) { struct userfaultfd_ctx *ctx = file->private_data; -- 1.9.1
| |