powerpc/pci: Fix build with PCI_IOV=y and EEH=n

Despite attempting to fix this in commit fb36e9073693 ("powerpc/pci: Fix
SRIOV not building without EEH enabled"), the build is still broken when
PCI_IOV=y and EEH=n (eg. g5_defconfig with PCI_IOV=y):

  arch/powerpc/kernel/pci_dn.c: In function ‘remove_dev_pci_data’:
  arch/powerpc/kernel/pci_dn.c:230:18: error: unused variable ‘edev’

Incorporate Ben's idea of using __maybe_unused to avoid so many #ifdefs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index bfe60a1..5926934 100644 (file)
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -31,6 +31,7 @@
 #include <asm/pci-bridge.h>
 #include <asm/ppc-pci.h>
 #include <asm/firmware.h>
+#include <asm/eeh.h>
 
 /*
  * The function is used to find the firmware data of one
@@ -181,9 +182,6 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
 {
 #ifdef CONFIG_PCI_IOV
        struct pci_dn *parent, *pdn;
-#ifdef CONFIG_EEH
-       struct eeh_dev *edev;
-#endif /* CONFIG_EEH */
        int i;
 
        /* Only support IOV for now */
@@ -201,6 +199,8 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
                return NULL;
 
        for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) {
+               struct eeh_dev *edev __maybe_unused;
+
                pdn = add_one_dev_pci_data(parent, NULL, i,
                                           pci_iov_virtfn_bus(pdev, i),
                                           pci_iov_virtfn_devfn(pdev, i));
@@ -227,7 +227,6 @@ void remove_dev_pci_data(struct pci_dev *pdev)
 #ifdef CONFIG_PCI_IOV
        struct pci_dn *parent;
        struct pci_dn *pdn, *tmp;
-       struct eeh_dev *edev;
        int i;
 
        /*
@@ -263,6 +262,8 @@ void remove_dev_pci_data(struct pci_dev *pdev)
         * a batch mode.
         */
        for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) {
+               struct eeh_dev *edev __maybe_unused;
+
                list_for_each_entry_safe(pdn, tmp,
                        &parent->child_list, list) {
                        if (pdn->busno != pci_iov_virtfn_bus(pdev, i) ||