Thread (50 messages) 50 messages, 16 authors, 2018-04-17

Re: [PATCH v2 06/21] fpga: Remove depends on HAS_DMA in case of platform dependency

From: Alan Tull <atull@kernel.org>
Date: 2018-03-19 16:06:29
Also in: alsa-devel, linux-crypto, linux-fpga, linux-i2c, linux-ide, linux-iio, linux-iommu, linux-mmc, linux-remoteproc, linux-scsi, linux-serial, linux-spi, lkml

On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
[off-list ref] wrote:

Hi Geert,

This essentially removes this commit

commit 1c8cb409491403036919dd1c6b45013dc8835a44
Author: Sudip Mukherjee [off-list ref]
Date:   Wed Aug 3 13:45:46 2016 -0700

    drivers/fpga/Kconfig: fix build failure

    While building m32r allmodconfig the build is failing with the error:

      ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined!

    Xilinx Zynq FPGA is using DMA but there was no dependency while
    building.

    Link: http://lkml.kernel.org/r/1464346526-13913-1-git-send-email-sudipm.mukherjee@gmail.com
    Signed-off-by: Sudip Mukherjee [off-list ref]
    Acked-by: Moritz Fischer [off-list ref]
    Cc: Alan Tull [off-list ref]
    Signed-off-by: Andrew Morton [off-list ref]
    Signed-off-by: Linus Torvalds [off-list ref]

Alan
quoted hunk ↗ jump to hunk
Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/fpga/Kconfig | 1 -
 1 file changed, 1 deletion(-)
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index f47ef848bcd056d5..fd539132542e30ee 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -53,7 +53,6 @@ config FPGA_MGR_ALTERA_CVP
 config FPGA_MGR_ZYNQ_FPGA
        tristate "Xilinx Zynq FPGA"
        depends on ARCH_ZYNQ || COMPILE_TEST
-       depends on HAS_DMA
        help
          FPGA manager driver support for Xilinx Zynq FPGAs.

--
2.7.4
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