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fe59493240
If CONFIG_PCI=n and gcc (e.g. 4.1.2) decides not to inline
get_pci_function_alias_group(), the build fails with:
drivers/iommu/iommu.o: In function `get_pci_function_alias_group':
iommu.c:(.text+0xfdc): undefined reference to `pci_acs_enabled'
Due to the various dummies for PCI calls in the CONFIG_PCI=n case,
pci_acs_enabled() never called, but not all versions of gcc are smart
enough to realize that.
While explicitly marking get_pci_function_alias_group() inline would fix
the build, this would inflate the code for the CONFIG_PCI=y case, as
get_pci_function_alias_group() is a not-so-small function called from two
places.
Hence fix the issue by introducing a dummy for pci_acs_enabled() instead.
Fixes: 0ae349a0f3 ("iommu/qcom: Add qcom_iommu")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.