pci_resource_is_mem(9)

okay so bestie, this page is pci_resource_is_mem(9) from the Kernel API Manual, and it's giving tiny-but-iconic type-check energy. let's get into it 💖

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✨ NAME ✨

pci_resource_is_mem — check if a PCI resource is of memory type.

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🎀 SYNOPSIS 🎀

bool pci_resource_is_mem (const struct pci_dev *dev , int resno );

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🌸 ARGUMENTS 🌸

• dev — the PCI device to check. lowkey the main character here.
• resno — the resource number (BAR index) to check. yes bestie, that exact one.

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🦋 DESCRIPTION 🦋

Returns true if the resource type is memory, including prefetchable memory. no cap, that's the whole description — it's a little boolean vibe check ✅

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🌈 SEE ALSO 🌈

Kernel file ./include/linux/pci.h and the whole friend group:

• enum pci_interrupt_pin(9)
• pci_channel_state_t(9)
• pci_is_bridge(9)
• pci_is_vga(9)
• pci_is_display(9)
• struct pci_driver(9)
• PCI_DEVICE(9)
• PCI_DEVICE_DRIVER_OVERRIDE(9)
• PCI_DRIVER_OVERRIDE_DEVICE_VFIO(9)
• PCI_DEVICE_SUB(9)
• PCI_DEVICE_CLASS(9)
• PCI_VDEVICE(9)
• PCI_VDEVICE_SUB(9)
• PCI_DEVICE_DATA(9)
• pcie_capability_clear_and_set_word(9)
• pci_bus_for_each_resource(9)
• module_pci_driver(9)
• builtin_pci_driver(9)
• pci_irq_type(9)
• pci_irqd_intx_xlate(9)
• pci_resource_is_io(9)
• pci_pcie_cap(9)
• pci_is_pcie(9)
• pcie_caps_reg(9)
• pci_pcie_type(9)
• pcie_find_root_port(9)
• pci_vpd_alloc(9)
• pci_vpd_find_id_string(9)
• pci_vpd_find_ro_info_keyword(9)
• pci_vpd_check_csum(9)
• pci_ari_enabled(9)
• pci_is_thunderbolt_attached(9)

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footer check: source/version ./include/linux · date October 2026 · page pci_resource_is_mem(9) — mwah 💋 slay your kernel journey, bestie 🫶✨