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xen/pci: Avoid -Wflex-array-member-not-at-end warning

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Use the `DEFINE_RAW_FLEX()` helper for an on-stack definition of
a flexible structure where the size of the flexible-array member
is known at compile-time, and refactor the rest of the code,
accordingly.

So, with this, fix the following warning:

drivers/xen/pci.c:48:55: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <kees@kernel.org>
Message-ID: <ZsU58MvoYEEqBHZl@elsanto>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Gustavo A. R. Silva 2024-08-20 18:50:56 -06:00 • committed by Juergen Gross
parent 3adc73efad
commit a8d0b5eb3f
1 changed files with 5 additions and 9 deletions
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14
drivers/xen/pci.c
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@ -44,15 +44,11 @@ static int xen_add_device(struct device *dev)
}
#endif
if (pci_seg_supported) {
struct {
struct physdev_pci_device_add add;
uint32_t pxm;
} add_ext = {
.add.seg = pci_domain_nr(pci_dev->bus),
.add.bus = pci_dev->bus->number,
.add.devfn = pci_dev->devfn
};
struct physdev_pci_device_add *add = &add_ext.add;
DEFINE_RAW_FLEX(struct physdev_pci_device_add, add, optarr, 1);
add->seg = pci_domain_nr(pci_dev->bus);
add->bus = pci_dev->bus->number;
add->devfn = pci_dev->devfn;
#ifdef CONFIG_ACPI
acpi_handle handle;