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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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| .. | ||
| dispnv04 | ||
| include | ||
| nvif | ||
| nvkm | ||
| Kbuild | ||
| Kconfig | ||
| nouveau_abi16.c | ||
| nouveau_abi16.h | ||
| nouveau_acpi.c | ||
| nouveau_acpi.h | ||
| nouveau_backlight.c | ||
| nouveau_bios.c | ||
| nouveau_bios.h | ||
| nouveau_bo.c | ||
| nouveau_bo.h | ||
| nouveau_chan.c | ||
| nouveau_chan.h | ||
| nouveau_connector.c | ||
| nouveau_connector.h | ||
| nouveau_crtc.h | ||
| nouveau_debugfs.c | ||
| nouveau_debugfs.h | ||
| nouveau_display.c | ||
| nouveau_display.h | ||
| nouveau_dma.c | ||
| nouveau_dma.h | ||
| nouveau_dp.c | ||
| nouveau_drm.c | ||
| nouveau_drv.h | ||
| nouveau_encoder.h | ||
| nouveau_fbcon.c | ||
| nouveau_fbcon.h | ||
| nouveau_fence.c | ||
| nouveau_fence.h | ||
| nouveau_gem.c | ||
| nouveau_gem.h | ||
| nouveau_hwmon.c | ||
| nouveau_hwmon.h | ||
| nouveau_ioc32.c | ||
| nouveau_ioctl.h | ||
| nouveau_nvif.c | ||
| nouveau_platform.c | ||
| nouveau_platform.h | ||
| nouveau_prime.c | ||
| nouveau_reg.h | ||
| nouveau_sgdma.c | ||
| nouveau_ttm.c | ||
| nouveau_ttm.h | ||
| nouveau_usif.c | ||
| nouveau_usif.h | ||
| nouveau_vga.c | ||
| nouveau_vga.h | ||
| nv04_fbcon.c | ||
| nv04_fence.c | ||
| nv10_fence.c | ||
| nv10_fence.h | ||
| nv17_fence.c | ||
| nv50_display.c | ||
| nv50_display.h | ||
| nv50_fbcon.c | ||
| nv50_fence.c | ||
| nv84_fence.c | ||
| nvc0_fbcon.c | ||
| nvc0_fence.c | ||