From: Sean Christopherson Date: Thu, 22 May 2025 23:52:17 +0000 (-0700) Subject: xen: privcmd: Don't mark eventfd waiter as EXCLUSIVE X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a52664134a24f3b0c425781082ce993617fc2797;p=thirdparty%2Flinux.git xen: privcmd: Don't mark eventfd waiter as EXCLUSIVE Don't set WQ_FLAG_EXCLUSIVE when adding an irqfd to a wait queue, as irqfd_wakeup() unconditionally returns '0', i.e. doesn't actually operate in exclusive mode. Note, the use of WQ_FLAG_PRIORITY is also dubious, but that's a problem for another day. Tested-by: K Prateek Nayak Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20250522235223.3178519-8-seanjc@google.com Signed-off-by: Sean Christopherson --- diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index c08ec8a7d27c1..13a10f3294a80 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -957,7 +957,6 @@ irqfd_poll_func(struct file *file, wait_queue_head_t *wqh, poll_table *pt) struct privcmd_kernel_irqfd *kirqfd = container_of(pt, struct privcmd_kernel_irqfd, pt); - kirqfd->wait.flags |= WQ_FLAG_EXCLUSIVE; add_wait_queue_priority(wqh, &kirqfd->wait); }