Re: Please revert upstream commit e4849aff1e16 ("MIPS: SiByte: Enable swiotlb ...") in v4.4.y and v4.14.y

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On 9/15/19 11:07 PM, Greg Kroah-Hartman wrote:
On Sun, Sep 15, 2019 at 04:01:08PM -0700, Guenter Roeck wrote:
Upstream commit e4849aff1e16 ("MIPS: SiByte: Enable swiotlb for SWARM,
LittleSur and BigSur") results in build failures in v4.4.y and v4.14.y.

make bigsur_defconfig:

warning: (SIBYTE_SWARM && SIBYTE_SENTOSA && SIBYTE_BIGSUR && SWIOTLB_XEN && AMD_IOMMU) selects SWIOTLB which has unmet direct dependencies (CAVIUM_OCTEON_SOC || MACH_LOONGSON64 && CPU_LOONGSON3 || NLM_XLP_BOARD || NLM_XLR_BOARD)
warning: (SIBYTE_SWARM && SIBYTE_SENTOSA && SIBYTE_BIGSUR && SWIOTLB_XEN && AMD_IOMMU) selects SWIOTLB which has unmet direct dependencies (CAVIUM_OCTEON_SOC || MACH_LOONGSON64 && CPU_LOONGSON3 || NLM_XLP_BOARD || NLM_XLR_BOARD)

and the actual build:

lib/swiotlb.o: In function `swiotlb_tbl_map_single':
(.text+0x1c0): undefined reference to `iommu_is_span_boundary'
Makefile:1021: recipe for target 'vmlinux' failed

Please revert.

Shouldn't I also revert it in 4.9.y?


Yes, of course. Sorry. Somehow 4.9 keeps slipping my mind :-(.

Guenter



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