linux-kernel - [PATCH 02/12] kvm: use __anon_inode

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Message-Id: <20200508153634.249933-3-hch@lst.de>
Date:   Fri,  8 May 2020 17:36:24 +0200
From:   Christoph Hellwig <hch@....de>
To:     Alexander Viro <viro@...iv.linux.org.uk>
Cc:     linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-rdma@...r.kernel.org, kvm@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, io-uring@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH 02/12] kvm: use __anon_inode_getfd

Use __anon_inode_getfd instead of opencoding the logic using
get_unused_fd_flags + anon_inode_getfile.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 virt/kvm/kvm_main.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 74bdb7bf32952..d20a7c2a30f1d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3822,17 +3822,11 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
 	if (r < 0)
 		goto put_kvm;
 #endif
-	r = get_unused_fd_flags(O_CLOEXEC);
+	r = __anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_CLOEXEC | O_RDWR,
+			&file);
 	if (r < 0)
 		goto put_kvm;
 
-	file = anon_inode_getfile("kvm-vm", &kvm_vm_fops, kvm, O_RDWR);
-	if (IS_ERR(file)) {
-		put_unused_fd(r);
-		r = PTR_ERR(file);
-		goto put_kvm;
-	}
-
 	/*
 	 * Don't call kvm_put_kvm anymore at this point; file->f_op is
 	 * already set, with ->release() being kvm_vm_release().  In error
-- 
2.26.2