diff mbox series

[09/12] KVM: Drop sanity check that per-VM list of irqfds is unique

Message ID 20250401204425.904001-10-seanjc@google.com (mailing list archive)
State Handled Elsewhere
Headers show
Series KVM: Make irqfd registration globally unique | expand

Checks

Context Check Description
bjorn/pre-ci_am success Success
bjorn/build-rv32-defconfig success build-rv32-defconfig
bjorn/build-rv64-clang-allmodconfig success build-rv64-clang-allmodconfig
bjorn/build-rv64-gcc-allmodconfig success build-rv64-gcc-allmodconfig
bjorn/build-rv64-nommu-k210-defconfig success build-rv64-nommu-k210-defconfig
bjorn/build-rv64-nommu-k210-virt success build-rv64-nommu-k210-virt
bjorn/checkpatch success checkpatch
bjorn/dtb-warn-rv64 success dtb-warn-rv64
bjorn/header-inline success header-inline
bjorn/kdoc success kdoc
bjorn/module-param success module-param
bjorn/verify-fixes success verify-fixes
bjorn/verify-signedoff success verify-signedoff

Commit Message

Sean Christopherson April 1, 2025, 8:44 p.m. UTC 
Now that the eventfd's waitqueue ensures it has at most one priority
waiter, i.e. prevents KVM from binding multiple irqfds to one eventfd,
drop KVM's sanity check that eventfds are unique for a single VM.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 virt/kvm/eventfd.c | 11 -----------
 1 file changed, 11 deletions(-)
diff mbox series

Patch

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 25c360ed2e1e..d21b956e7daa 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -288,7 +288,6 @@  static void kvm_irqfd_register(struct file *file, wait_queue_head_t *wqh,
 {
 	struct kvm_irqfd_pt *p = container_of(pt, struct kvm_irqfd_pt, pt);
 	struct kvm_kernel_irqfd *irqfd = p->irqfd;
-	struct kvm_kernel_irqfd *tmp;
 	struct kvm *kvm = p->kvm;
 
 	/*
@@ -328,16 +327,6 @@  static void kvm_irqfd_register(struct file *file, wait_queue_head_t *wqh,
 	if (p->ret)
 		goto out;
 
-	list_for_each_entry(tmp, &kvm->irqfds.items, list) {
-		if (irqfd->eventfd != tmp->eventfd)
-			continue;
-
-		WARN_ON_ONCE(1);
-		/* This fd is used for another irq already. */
-		p->ret = -EBUSY;
-		goto out;
-	}
-
 	list_add_tail(&irqfd->list, &kvm->irqfds.items);
 
 out: