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SubjectRe: [PATCH v8 7/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs
Hi Jake,

[auto build test WARNING on pci/next]
[also build test WARNING on v4.4-rc4 next-20151209]

url: https://github.com/0day-ci/linux/commits/jakeo-microsoft-com/PCI-hv-New-paravirtual-PCI-front-end-for-Hyper-V-VMs/20151210-035122
base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: i386-allmodconfig (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All warnings (new ones prefixed by >>):

drivers/pci/host/hv_pcifront.c: In function 'prepopulate_bars':
drivers/pci/host/hv_pcifront.c:1094:23: warning: right shift count >= width of type [-Wshift-count-overflow]
(u32)(high_base >> 32));
^
drivers/pci/host/hv_pcifront.c: In function 'hv_pci_onchannelcallback':
drivers/pci/host/hv_pcifront.c:1627:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
comp_packet = (struct pci_packet *)req_id;
^
In file included from include/linux/printk.h:6:0,
from include/linux/kernel.h:13,
from drivers/pci/host/hv_pcifront.c:21:
drivers/pci/host/hv_pcifront.c: In function 'hv_pci_allocate_bridge_windows':
>> include/linux/kern_levels.h:4:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 2 has type 'resource_size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/kern_levels.h:10:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^
include/linux/printk.h:252:9: note: in expansion of macro 'KERN_ERR'
printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^
>> drivers/pci/host/hv_pcifront.c:1785:4: note: in expansion of macro 'pr_err'
pr_err("Need %llx of low MMIO space. "
^
drivers/pci/host/hv_pcifront.c:1800:8: warning: large integer implicitly truncated to unsigned type [-Woverflow]
0x100000000, -1,
^
In file included from include/linux/printk.h:6:0,
from include/linux/kernel.h:13,
from drivers/pci/host/hv_pcifront.c:21:
>> include/linux/kern_levels.h:4:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 2 has type 'resource_size_t {aka unsigned int}' [-Wformat=]
#define KERN_SOH "\001" /* ASCII Start Of Header */
^
include/linux/kern_levels.h:10:18: note: in expansion of macro 'KERN_SOH'
#define KERN_ERR KERN_SOH "3" /* error conditions */
^
include/linux/printk.h:252:9: note: in expansion of macro 'KERN_ERR'
printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
^
drivers/pci/host/hv_pcifront.c:1804:4: note: in expansion of macro 'pr_err'
pr_err("Need %llx of high MMIO space. "
^

vim +/pr_err +1785 drivers/pci/host/hv_pcifront.c

1769 * @hbus: Root PCI bus, as understood by this driver
1770 *
1771 * Return: 0 on success, -errno on failure
1772 */
1773 static int hv_pci_allocate_bridge_windows(struct hv_pcibus_device *hbus)
1774 {
1775 resource_size_t align;
1776 int ret;
1777
1778 if (hbus->low_mmio_space) {
1779 align = 1ULL << (63 - __builtin_clzll(hbus->low_mmio_space));
1780 ret = vmbus_allocate_mmio(&hbus->low_mmio_res, hbus->hdev, 0,
1781 (u64)(u32)0xffffffff,
1782 hbus->low_mmio_space,
1783 align, false);
1784 if (ret) {
> 1785 pr_err("Need %llx of low MMIO space. "
1786 "Consider reconfiguring the VM.\n",
1787 hbus->low_mmio_space);
1788 return ret;
1789 }
1790
1791 hbus->low_mmio_res->flags |= IORESOURCE_WINDOW;
1792 hbus->low_mmio_res->flags &= ~IORESOURCE_BUSY;
1793 pci_add_resource(&hbus->resources_for_children,

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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