linux/arch/hexagon/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
..
asm-offsets.c Hexagon: update copyright dates 2013-04-30 19:40:27 -05:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
head.S Hexagon: update copyright dates 2013-04-30 19:40:27 -05:00
hexagon_ksyms.c arch: hexagon: kernel: hexagon_ksyms.c: export related symbols which various modules need 2014-04-04 18:20:00 -05:00
irq_cpu.c Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
kgdb.c hexagon: Fix misspellings in comments. 2016-04-18 12:45:54 +02:00
Makefile Hexagon: add screen_info for VGA_CONSOLE 2014-04-04 18:20:01 -05:00
module.c Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
ptrace.c Hexagon: set the e_flags in user regset view for core dumps 2014-04-04 18:20:02 -05:00
reset.c arch: hexagon: kernel: reset.c: use function pointer instead of function for pm_power_off and export it 2014-04-04 18:20:00 -05:00
screen_info.c Hexagon: add screen_info for VGA_CONSOLE 2014-04-04 18:20:01 -05:00
setup.c hexagon: Fix build failures in linux-next 2014-12-16 13:27:12 -06:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
smp.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
syscalltab.c Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
time.c hexagon/time: Migrate to new 'set-state' interface 2015-09-08 18:43:17 -05:00
trampoline.S Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
traps.c Hexagon: fix signal delivery for debug traps 2014-12-16 13:27:39 -06:00
vdso.c vdso: make arch_setup_additional_pages wait for mmap_sem for write killable 2016-05-23 17:04:14 -07:00
vm_entry.S Hexagon: fix register used to call do_work_pending 2013-05-07 11:37:53 -05:00
vm_events.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 2013-05-01 07:43:05 -07:00
vm_init_segtable.S Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
vm_ops.S hexagon: Fix misspellings in comments. 2016-04-18 12:45:54 +02:00
vm_switch.S Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
vm_vectors.S Hexagon: update copyright dates 2013-04-30 19:40:27 -05:00
vmlinux.lds.S Hexagon: fix alignment of init_task in RW_DATA_SECTION 2014-12-16 13:27:22 -06:00