linux/arch/arm/common
Krzysztof Kozlowski 00085f1efa dma-mapping: use unsigned long for dma_attrs
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>
2016-08-04 08:50:07 -04:00
..
Kconfig ARM/dmaengine: edma: Merge the two drivers under drivers/dma/ 2015-10-14 19:57:11 +05:30
Makefile ARM/dmaengine: edma: Merge the two drivers under drivers/dma/ 2015-10-14 19:57:11 +05:30
bL_switcher.c arm/bL_switcher: Kill tick suspend hackery 2015-04-01 14:23:00 +02:00
bL_switcher_dummy_if.c ARM: bL_switcher: add a simple /dev user interface for debugging purposes 2013-08-05 00:13:00 -04:00
dmabounce.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
firmware.c ARM: Add interface for registering and calling firmware-specific operations 2013-04-09 01:52:06 +09:00
icst.c ARM: 8519/1: ICST: try other dividends than 1 2016-02-11 14:12:33 +00:00
it8152.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
locomo.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mcpm_entry.c ARM: MCPM: remove residency argument from mcpm_cpu_suspend() 2015-05-06 11:47:10 -04:00
mcpm_head.S ARM: replace BSYM() with badr assembly macro 2015-05-08 17:33:50 +01:00
mcpm_platsmp.c ARM: use const and __initconst for smp_operations 2015-12-01 22:17:45 +01:00
sa1111.c ARM: 8523/1: sa1111: ensure no negative value gets returned on positive match 2016-02-16 16:28:50 +00:00
scoop.c ARM: scoop: use gpiochip data pointer 2016-02-19 09:51:41 +01:00
sharpsl_param.c ARM: 7845/1: sharpsl_param.c: fix invalid memory access for pxa devices 2013-10-03 10:39:43 +01:00
vlock.S ARM: mcpm: use -st dsb option prior to sev instructions 2013-08-12 12:25:45 +01:00
vlock.h ARM: mcpm: Add baremetal voting mutexes 2013-04-24 10:37:01 -04:00