From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:126:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
Date: Thu, 02 Dec 2021 06:23:48 +0800 [thread overview]
Message-ID: <202112020618.8Bxdky7v-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 21202 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Qing Zhang <zhangqing@loongson.cn>
CC: Jiaxun Yang <jiaxun.yang@flygoat.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 58e1100fdc5990b0cc0d4beaf2562a92e621ac7d
commit: 30bba69d7db40e732d6c0aa6d4890c60d717e314 stmmac: pci: Add dwmac support for Loongson
date: 6 months ago
:::::: branch date: 25 hours ago
:::::: commit date: 6 months ago
config: i386-randconfig-c001-20211130 (https://download.01.org/0day-ci/archive/20211202/202112020618.8Bxdky7v-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 25eb7fa01d7ebbe67648ea03841cda55b4239ab2)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30bba69d7db40e732d6c0aa6d4890c60d717e314
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 30bba69d7db40e732d6c0aa6d4890c60d717e314
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:873:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:873:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:949:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:949:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:967:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:967:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:986:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
drivers/media/dvb-frontends/af9033.c:986:21: note: Value stored to 'client' during its initialization is never read
struct i2c_client *client = dev->client;
^~~~~~ ~~~~~~~~~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
15 warnings generated.
Suppressed 15 warnings (15 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
15 warnings generated.
Suppressed 15 warnings (15 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
13 warnings generated.
Suppressed 13 warnings (13 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
15 warnings generated.
Suppressed 15 warnings (15 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
15 warnings generated.
Suppressed 15 warnings (15 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
15 warnings generated.
Suppressed 15 warnings (15 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:76:6: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (mdio) {
^~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:52:14: note: 'mdio' declared without an initial value
int ret, i, mdio;
^~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:55:7: note: Calling 'dev_of_node'
np = dev_of_node(&pdev->dev);
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/device.h:769:6: note: Left side of '||' is false
if (!IS_ENABLED(CONFIG_OF) || !dev)
^
include/linux/device.h:769:32: note: Assuming 'dev' is non-null, which participates in a condition later
if (!IS_ENABLED(CONFIG_OF) || !dev)
^~~~
include/linux/device.h:769:2: note: Taking false branch
if (!IS_ENABLED(CONFIG_OF) || !dev)
^
include/linux/device.h:771:2: note: Returning without writing to 'dev->of_node', which participates in a condition later
return dev->of_node;
^
include/linux/device.h:771:2: note: Returning pointer, which participates in a condition later
return dev->of_node;
^~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:55:7: note: Returning from 'dev_of_node'
np = dev_of_node(&pdev->dev);
^~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:57:6: note: Assuming 'np' is non-null
if (!np) {
^~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:57:2: note: Taking false branch
if (!np) {
^
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:62:6: note: Assuming the condition is false
if (!of_device_is_compatible(np, "loongson, pci-gmac")) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:62:2: note: Taking false branch
if (!of_device_is_compatible(np, "loongson, pci-gmac")) {
^
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:68:6: note: Assuming 'plat' is non-null
if (!plat)
^~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:68:2: note: Taking false branch
if (!plat)
^
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:71:6: note: Assuming field 'mdio_node' is null
if (plat->mdio_node) {
^~~~~~~~~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:71:2: note: Taking false branch
if (plat->mdio_node) {
^
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:76:6: note: Branch condition evaluates to a garbage value
if (mdio) {
^~~~
>> drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:126:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = -ENODEV;
^ ~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:126:3: note: Value stored to 'ret' is never read
ret = -ENODEV;
^ ~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:138:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = -ENODEV;
^ ~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:138:3: note: Value stored to 'ret' is never read
ret = -ENODEV;
^ ~~~~~~~
Suppressed 16 warnings (15 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
drivers/hwmon/pmbus/zl6100.c:115:41: warning: The result of the left shift is undefined because the left operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult]
return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
^
drivers/hwmon/pmbus/zl6100.c:230:29: note: Left side of '&&' is false
struct zl6100_data *data = to_zl6100_data(info);
^
drivers/hwmon/pmbus/zl6100.c:30:28: note: expanded from macro 'to_zl6100_data'
#define to_zl6100_data(x) container_of(x, struct zl6100_data, info)
^
include/linux/kernel.h:716:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
drivers/hwmon/pmbus/zl6100.c:230:29: note: Taking false branch
struct zl6100_data *data = to_zl6100_data(info);
^
drivers/hwmon/pmbus/zl6100.c:30:28: note: expanded from macro 'to_zl6100_data'
#define to_zl6100_data(x) container_of(x, struct zl6100_data, info)
^
include/linux/kernel.h:716:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:308:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
drivers/hwmon/pmbus/zl6100.c:230:29: note: Loop condition is false. Exiting loop
struct zl6100_data *data = to_zl6100_data(info);
^
drivers/hwmon/pmbus/zl6100.c:30:28: note: expanded from macro 'to_zl6100_data'
#define to_zl6100_data(x) container_of(x, struct zl6100_data, info)
^
include/linux/kernel.h:716:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:306:2: note: expanded from macro '__compiletime_assert'
do { \
^
drivers/hwmon/pmbus/zl6100.c:233:6: note: Assuming 'page' is <= 0
if (page > 0)
^~~~~~~~
drivers/hwmon/pmbus/zl6100.c:233:2: note: Taking false branch
if (page > 0)
^
drivers/hwmon/pmbus/zl6100.c:236:2: note: Control jumps to 'case PMBUS_VIRT_VMON_UV_WARN_LIMIT:' at line 246
switch (reg) {
^
drivers/hwmon/pmbus/zl6100.c:247:21: note: Left side of '||' is false
word = zl6100_d2l(DIV_ROUND_CLOSEST(zl6100_l2d(word) * 10, 11));
^
include/linux/math.h:89:3: note: expanded from macro 'DIV_ROUND_CLOSEST'
(((typeof(x))-1) > 0 || \
^
drivers/hwmon/pmbus/zl6100.c:247:21: note: Left side of '||' is false
word = zl6100_d2l(DIV_ROUND_CLOSEST(zl6100_l2d(word) * 10, 11));
^
include/linux/math.h:89:3: note: expanded from macro 'DIV_ROUND_CLOSEST'
(((typeof(x))-1) > 0 || \
^
drivers/hwmon/pmbus/zl6100.c:247:21: note: Assuming '__x' is <= 0
word = zl6100_d2l(DIV_ROUND_CLOSEST(zl6100_l2d(word) * 10, 11));
^
include/linux/math.h:91:5: note: expanded from macro 'DIV_ROUND_CLOSEST'
(((__x) > 0) == ((__d) > 0))) ? \
vim +/ret +126 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
30bba69d7db40e7 Qing Zhang 2021-06-18 47
30bba69d7db40e7 Qing Zhang 2021-06-18 48 static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
30bba69d7db40e7 Qing Zhang 2021-06-18 49 {
30bba69d7db40e7 Qing Zhang 2021-06-18 50 struct plat_stmmacenet_data *plat;
30bba69d7db40e7 Qing Zhang 2021-06-18 51 struct stmmac_resources res;
30bba69d7db40e7 Qing Zhang 2021-06-18 52 int ret, i, mdio;
30bba69d7db40e7 Qing Zhang 2021-06-18 53 struct device_node *np;
30bba69d7db40e7 Qing Zhang 2021-06-18 54
30bba69d7db40e7 Qing Zhang 2021-06-18 55 np = dev_of_node(&pdev->dev);
30bba69d7db40e7 Qing Zhang 2021-06-18 56
30bba69d7db40e7 Qing Zhang 2021-06-18 57 if (!np) {
30bba69d7db40e7 Qing Zhang 2021-06-18 58 pr_info("dwmac_loongson_pci: No OF node\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 59 return -ENODEV;
30bba69d7db40e7 Qing Zhang 2021-06-18 60 }
30bba69d7db40e7 Qing Zhang 2021-06-18 61
30bba69d7db40e7 Qing Zhang 2021-06-18 62 if (!of_device_is_compatible(np, "loongson, pci-gmac")) {
30bba69d7db40e7 Qing Zhang 2021-06-18 63 pr_info("dwmac_loongson_pci: Incompatible OF node\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 64 return -ENODEV;
30bba69d7db40e7 Qing Zhang 2021-06-18 65 }
30bba69d7db40e7 Qing Zhang 2021-06-18 66
30bba69d7db40e7 Qing Zhang 2021-06-18 67 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
30bba69d7db40e7 Qing Zhang 2021-06-18 68 if (!plat)
30bba69d7db40e7 Qing Zhang 2021-06-18 69 return -ENOMEM;
30bba69d7db40e7 Qing Zhang 2021-06-18 70
30bba69d7db40e7 Qing Zhang 2021-06-18 71 if (plat->mdio_node) {
30bba69d7db40e7 Qing Zhang 2021-06-18 72 dev_err(&pdev->dev, "Found MDIO subnode\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 73 mdio = true;
30bba69d7db40e7 Qing Zhang 2021-06-18 74 }
30bba69d7db40e7 Qing Zhang 2021-06-18 75
30bba69d7db40e7 Qing Zhang 2021-06-18 76 if (mdio) {
30bba69d7db40e7 Qing Zhang 2021-06-18 77 plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
30bba69d7db40e7 Qing Zhang 2021-06-18 78 sizeof(*plat->mdio_bus_data),
30bba69d7db40e7 Qing Zhang 2021-06-18 79 GFP_KERNEL);
30bba69d7db40e7 Qing Zhang 2021-06-18 80 if (!plat->mdio_bus_data)
30bba69d7db40e7 Qing Zhang 2021-06-18 81 return -ENOMEM;
30bba69d7db40e7 Qing Zhang 2021-06-18 82 plat->mdio_bus_data->needs_reset = true;
30bba69d7db40e7 Qing Zhang 2021-06-18 83 }
30bba69d7db40e7 Qing Zhang 2021-06-18 84
30bba69d7db40e7 Qing Zhang 2021-06-18 85 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL);
30bba69d7db40e7 Qing Zhang 2021-06-18 86 if (!plat->dma_cfg)
30bba69d7db40e7 Qing Zhang 2021-06-18 87 return -ENOMEM;
30bba69d7db40e7 Qing Zhang 2021-06-18 88
30bba69d7db40e7 Qing Zhang 2021-06-18 89 /* Enable pci device */
30bba69d7db40e7 Qing Zhang 2021-06-18 90 ret = pci_enable_device(pdev);
30bba69d7db40e7 Qing Zhang 2021-06-18 91 if (ret) {
30bba69d7db40e7 Qing Zhang 2021-06-18 92 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", __func__);
30bba69d7db40e7 Qing Zhang 2021-06-18 93 return ret;
30bba69d7db40e7 Qing Zhang 2021-06-18 94 }
30bba69d7db40e7 Qing Zhang 2021-06-18 95
30bba69d7db40e7 Qing Zhang 2021-06-18 96 /* Get the base address of device */
30bba69d7db40e7 Qing Zhang 2021-06-18 97 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
30bba69d7db40e7 Qing Zhang 2021-06-18 98 if (pci_resource_len(pdev, i) == 0)
30bba69d7db40e7 Qing Zhang 2021-06-18 99 continue;
30bba69d7db40e7 Qing Zhang 2021-06-18 100 ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
30bba69d7db40e7 Qing Zhang 2021-06-18 101 if (ret)
30bba69d7db40e7 Qing Zhang 2021-06-18 102 return ret;
30bba69d7db40e7 Qing Zhang 2021-06-18 103 break;
30bba69d7db40e7 Qing Zhang 2021-06-18 104 }
30bba69d7db40e7 Qing Zhang 2021-06-18 105
30bba69d7db40e7 Qing Zhang 2021-06-18 106 plat->bus_id = of_alias_get_id(np, "ethernet");
30bba69d7db40e7 Qing Zhang 2021-06-18 107 if (plat->bus_id < 0)
30bba69d7db40e7 Qing Zhang 2021-06-18 108 plat->bus_id = pci_dev_id(pdev);
30bba69d7db40e7 Qing Zhang 2021-06-18 109
30bba69d7db40e7 Qing Zhang 2021-06-18 110 plat->phy_interface = device_get_phy_mode(&pdev->dev);
30bba69d7db40e7 Qing Zhang 2021-06-18 111 if (plat->phy_interface < 0)
30bba69d7db40e7 Qing Zhang 2021-06-18 112 dev_err(&pdev->dev, "phy_mode not found\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 113
30bba69d7db40e7 Qing Zhang 2021-06-18 114 plat->interface = PHY_INTERFACE_MODE_GMII;
30bba69d7db40e7 Qing Zhang 2021-06-18 115
30bba69d7db40e7 Qing Zhang 2021-06-18 116 pci_set_master(pdev);
30bba69d7db40e7 Qing Zhang 2021-06-18 117
30bba69d7db40e7 Qing Zhang 2021-06-18 118 loongson_default_data(plat);
30bba69d7db40e7 Qing Zhang 2021-06-18 119 pci_enable_msi(pdev);
30bba69d7db40e7 Qing Zhang 2021-06-18 120 memset(&res, 0, sizeof(res));
30bba69d7db40e7 Qing Zhang 2021-06-18 121 res.addr = pcim_iomap_table(pdev)[0];
30bba69d7db40e7 Qing Zhang 2021-06-18 122
30bba69d7db40e7 Qing Zhang 2021-06-18 123 res.irq = of_irq_get_byname(np, "macirq");
30bba69d7db40e7 Qing Zhang 2021-06-18 124 if (res.irq < 0) {
30bba69d7db40e7 Qing Zhang 2021-06-18 125 dev_err(&pdev->dev, "IRQ macirq not found\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 @126 ret = -ENODEV;
30bba69d7db40e7 Qing Zhang 2021-06-18 127 }
30bba69d7db40e7 Qing Zhang 2021-06-18 128
30bba69d7db40e7 Qing Zhang 2021-06-18 129 res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
30bba69d7db40e7 Qing Zhang 2021-06-18 130 if (res.wol_irq < 0) {
30bba69d7db40e7 Qing Zhang 2021-06-18 131 dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 132 res.wol_irq = res.irq;
30bba69d7db40e7 Qing Zhang 2021-06-18 133 }
30bba69d7db40e7 Qing Zhang 2021-06-18 134
30bba69d7db40e7 Qing Zhang 2021-06-18 135 res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
30bba69d7db40e7 Qing Zhang 2021-06-18 136 if (res.lpi_irq < 0) {
30bba69d7db40e7 Qing Zhang 2021-06-18 137 dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
30bba69d7db40e7 Qing Zhang 2021-06-18 138 ret = -ENODEV;
30bba69d7db40e7 Qing Zhang 2021-06-18 139 }
30bba69d7db40e7 Qing Zhang 2021-06-18 140
30bba69d7db40e7 Qing Zhang 2021-06-18 141 return stmmac_dvr_probe(&pdev->dev, plat, &res);
30bba69d7db40e7 Qing Zhang 2021-06-18 142 }
30bba69d7db40e7 Qing Zhang 2021-06-18 143
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2021-12-01 22:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-01 22:23 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-12-08 16:45 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:126:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
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