linux/arch/openrisc/kernel
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
..
Makefile openrisc: Use generic idle loop 2013-04-08 17:39:27 +02:00
asm-offsets.c openrisc: use kbuild.h instead of defining macros in asm-offset.c 2012-10-25 15:54:33 +02:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
entry.S openrisc: Rework signal handling 2014-01-09 10:57:21 +01:00
head.S openrisc: drop _PAGE_FILE and pte_file()-related helpers 2015-02-10 14:30:33 -08:00
irq.c openrisc: Get rid of handle_IRQ 2014-09-03 13:11:02 +00:00
module.c openrisc: Refactor 16-bit constant relocation 2013-11-05 16:27:55 +01:00
or32_ksyms.c OpenRISC: Miscellaneous 2011-07-22 18:46:41 +02:00
process.c whack-a-mole: no need to set_fs(USER_DS) in {start,flush}_thread() 2015-04-11 22:24:31 -04:00
prom.c openrisc: remove unnecessary prom.c includes 2013-10-09 11:39:01 -05:00
ptrace.c ARCH: AUDIT: audit_syscall_entry() should not require the arch 2014-09-23 16:21:26 -04:00
setup.c openrisc: remove use of seq_printf return value 2015-04-15 16:35:25 -07:00
signal.c arch: Remove exec_domain from remaining archs 2015-04-12 21:03:30 +02:00
sys_call_table.c OpenRISC: System calls 2011-07-22 18:46:34 +02:00
time.c openrisc/time: Migrate to new 'set-state' interface 2015-08-10 11:41:02 +02:00
traps.c dump_stack: consolidate dump_stack() implementations and unify their behaviors 2013-04-30 17:04:02 -07:00
vmlinux.h of/fdt: consolidate built-in dtb section variables 2014-04-30 00:59:13 -05:00
vmlinux.lds.S arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00