mirror of https://gitee.com/openkylin/linux.git
00085f1efa
The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to it to dma_set_attr(), just set the bits. 2. It brings safeness and checking for const correctness because the attributes are passed by value. Semantic patches for this change (at least most of them): virtual patch virtual context @r@ identifier f, attrs; @@ f(..., - struct dma_attrs *attrs + unsigned long attrs , ...) { ... } @@ identifier r.f; @@ f(..., - NULL + 0 ) and // Options: --all-includes virtual patch virtual context @r@ identifier f, attrs; type t; @@ t f(..., struct dma_attrs *attrs); @@ identifier r.f; @@ f(..., - NULL + 0 ) Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Acked-by: Mark Salter <msalter@redhat.com> [c6x] Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris] Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm] Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp] Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core] Acked-by: David Vrabel <david.vrabel@citrix.com> [xen] Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb] Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390] Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32] Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc] Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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.. | ||
blackfin | ||
davinci | ||
drv-intf | ||
i2c | ||
cec-edid.h | ||
cec.h | ||
i2c-addr.h | ||
lirc.h | ||
lirc_dev.h | ||
media-device.h | ||
media-devnode.h | ||
media-entity.h | ||
rc-core.h | ||
rc-map.h | ||
rcar-fcp.h | ||
soc_camera.h | ||
tuner-types.h | ||
tuner.h | ||
tveeprom.h | ||
v4l2-async.h | ||
v4l2-clk.h | ||
v4l2-common.h | ||
v4l2-ctrls.h | ||
v4l2-dev.h | ||
v4l2-device.h | ||
v4l2-dv-timings.h | ||
v4l2-event.h | ||
v4l2-fh.h | ||
v4l2-flash-led-class.h | ||
v4l2-image-sizes.h | ||
v4l2-ioctl.h | ||
v4l2-mc.h | ||
v4l2-mediabus.h | ||
v4l2-mem2mem.h | ||
v4l2-of.h | ||
v4l2-rect.h | ||
v4l2-subdev.h | ||
v4l2-tpg-colors.h | ||
v4l2-tpg.h | ||
videobuf-core.h | ||
videobuf-dma-contig.h | ||
videobuf-dma-sg.h | ||
videobuf-dvb.h | ||
videobuf-vmalloc.h | ||
videobuf2-core.h | ||
videobuf2-dma-contig.h | ||
videobuf2-dma-sg.h | ||
videobuf2-dvb.h | ||
videobuf2-memops.h | ||
videobuf2-v4l2.h | ||
videobuf2-vmalloc.h | ||
vsp1.h |