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-rw-r--r--include/efi_api.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/efi_api.h b/include/efi_api.h
index ac58fd58dea..0c361221075 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -304,6 +304,7 @@ struct efi_device_path_vendor {
#define EFI_PNP_ID(ID) (u32)(((ID) << 16) | 0x41D0)
#define EISA_PNP_ID(ID) EFI_PNP_ID(ID)
+#define EISA_PNP_NUM(ID) ((ID) >> 16)
struct efi_device_path_acpi_path {
struct efi_device_path dp;