linux-kernel - [PATCH 2/5] PCI: hv: use pci_function_description[0] in struct definitions

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Date:   Tue, 23 Aug 2016 04:46:39 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        KY Srinivasan <kys@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Hadden Hoppert <haddenh@...rosoft.com>,
        "helgaas@...nel.org" <helgaas@...nel.org>,
        "Stephen Hemminger" <sthemmin@...rosoft.com>
Subject: [PATCH 2/5] PCI: hv: use pci_function_description[0] in struct
 definitions


The 2 structs can use a zero-length array here, because dynamic memory of
the correct size is allocated in hv_pci_devices_present() and we don't
need this extra element.

No functional change.

Cc: Jake Oshins <jakeo@...rosoft.com>
Cc: K. Y. Srinivasan <kys@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>
Signed-off-by: Dexuan Cui <decui@...rosoft.com>
---
 drivers/pci/host/pci-hyperv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index 78758e9..cdbadea5 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -259,7 +259,7 @@ struct pci_bus_d0_entry {
 struct pci_bus_relations {
 	struct pci_incoming_message incoming;
 	u32 device_count;
-	struct pci_function_description func[1];
+	struct pci_function_description func[0];
 } __packed;
 
 struct pci_q_res_req_response {
@@ -394,7 +394,7 @@ struct hv_dr_work {
 struct hv_dr_state {
 	struct list_head list_entry;
 	u32 device_count;
-	struct pci_function_description func[1];
+	struct pci_function_description func[0];
 };
 
 enum hv_pcichild_state {
-- 
2.7.4