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SubjectRe: [PATCH 3/5] dma-mapping: make support for dma ops optional
On Wed, Jul 08, 2020 at 05:24:47PM +0200, Christoph Hellwig wrote:
> Avoid the overhead of the dma ops support for tiny builds that only
> use the direct mapping.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

For ppc:pmac32_defconfig and other configurations, this patch results in:

Error log:
drivers/macintosh/macio_asic.c: In function 'macio_add_one_device':
drivers/macintosh/macio_asic.c:393:16: error: 'struct device' has no member named 'dma_ops'
393 | dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
| ^
drivers/macintosh/macio_asic.c:393:47: error: 'struct device' has no member named 'dma_ops'
393 | dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
| ^

Bisect log attached.

Guenter

---
# bad: [aab7ee9f8ff0110bfcd594b33dc33748dc1baf46] Add linux-next specific files for 20200717
# good: [11ba468877bb23f28956a35e896356252d63c983] Linux 5.8-rc5
git bisect start 'HEAD' 'v5.8-rc5'
# bad: [4d55a7a1298d197755c1a0f4512f56917e938a83] Merge remote-tracking branch 'crypto/master'
git bisect bad 4d55a7a1298d197755c1a0f4512f56917e938a83
# bad: [49485850238eb3fc72aac951e47e33e367aafbab] Merge remote-tracking branch 'hid/for-next'
git bisect bad 49485850238eb3fc72aac951e47e33e367aafbab
# bad: [4406fe306759d700f2b2aa8adf890a7d7ef064ae] Merge remote-tracking branch 'tegra/for-next'
git bisect bad 4406fe306759d700f2b2aa8adf890a7d7ef064ae
# bad: [27f18f0e00ed1f15ee55d479216c874561b6b70a] Merge remote-tracking branch 'arm-soc/for-next'
git bisect bad 27f18f0e00ed1f15ee55d479216c874561b6b70a
# good: [a23a793b03f465cf2222fa29e7f81d732a6f6fdf] Merge remote-tracking branch 'usb-chipidea-fixes/ci-for-usb-stable'
git bisect good a23a793b03f465cf2222fa29e7f81d732a6f6fdf
# good: [05d94a2de41e8d9840d9749d553febdcf99cb0e5] Merge branch 'arm/drivers' into for-next
git bisect good 05d94a2de41e8d9840d9749d553febdcf99cb0e5
# good: [5fef5dc17f097794288acb098ccc80eb91142bf4] Merge branch 'for-next/mte' into for-next/core
git bisect good 5fef5dc17f097794288acb098ccc80eb91142bf4
# good: [3c7f84b2248457030a903813e4af71d80141d663] Merge remote-tracking branch 'fpga-fixes/fixes'
git bisect good 3c7f84b2248457030a903813e4af71d80141d663
# bad: [88ff79e455afa3ac90739da27e24f655a965e3cf] Merge remote-tracking branch 'dma-mapping/for-next'
git bisect bad 88ff79e455afa3ac90739da27e24f655a965e3cf
# good: [7c4d50d4973b40c53ef6c592b41b0473127e6762] kbuild: do not export LDFLAGS_vmlinux
git bisect good 7c4d50d4973b40c53ef6c592b41b0473127e6762
# good: [c45db534668104ed5112ed371526db6096ac5742] Merge remote-tracking branch 'kbuild/for-next'
git bisect good c45db534668104ed5112ed371526db6096ac5742
# bad: [249542813648f7a278895ad25674d3e147f49ad6] dma-mapping: make support for dma ops optional
git bisect bad 249542813648f7a278895ad25674d3e147f49ad6
# good: [b4174173005972f8f6497883d08d87e0aba1b604] dma-mapping: inline the fast path dma-direct calls
git bisect good b4174173005972f8f6497883d08d87e0aba1b604
# first bad commit: [249542813648f7a278895ad25674d3e147f49ad6] dma-mapping: make support for dma ops optional

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