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powerpc: iommu: fix build when neither PCI or IBMVIO is set 

[ Upstream commit b27dadecdf9102838331b9a0b41ffc1cfe288154 ]

When neither CONFIG_PCI nor CONFIG_IBMVIO is set/enabled, iommu.c has a
build error. The fault injection code is not useful in that kernel config,
so make the FAIL_IOMMU option depend on PCI || IBMVIO.

Prevents this build error (warning escalated to error):
../arch/powerpc/kernel/iommu.c:178:30: error: 'fail_iommu_bus_notifier' defined but not used [-Werror=unused-variable]
  178 | static struct notifier_block fail_iommu_bus_notifier = {

Fixes: d6b9a81b2a ("powerpc: IOMMU fault injection")
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210404192623.10697-1-rdunlap@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Randy Dunlap 2021-04-04 12:26:23 -07:00 committed by Greg Kroah-Hartman
parent 5aa028a827
commit 22cb8496f2
1 changed files with 1 additions and 0 deletions
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arch/powerpc/Kconfig.debug
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@ -352,6 +352,7 @@ config PPC_EARLY_DEBUG_CPM_ADDR
config FAIL_IOMMU
bool "Fault-injection capability for IOMMU"
depends on FAULT_INJECTION
depends on PCI || IBMVIO
help
Provide fault-injection capability for IOMMU. Each device can
be selectively enabled via the fail_iommu property.