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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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| .. | ||
| vdso32 | ||
| vdso64 | ||
| .gitignore | ||
| align.c | ||
| asm-offsets.c | ||
| audit.c | ||
| btext.c | ||
| cacheinfo.c | ||
| cacheinfo.h | ||
| compat_audit.c | ||
| cpu_setup_6xx.S | ||
| cpu_setup_44x.S | ||
| cpu_setup_fsl_booke.S | ||
| cpu_setup_pa6t.S | ||
| cpu_setup_power.S | ||
| cpu_setup_ppc970.S | ||
| cputable.c | ||
| crash_dump.c | ||
| crash.c | ||
| dbell.c | ||
| dma-iommu.c | ||
| dma-swiotlb.c | ||
| dma.c | ||
| eeh_cache.c | ||
| eeh_dev.c | ||
| eeh_driver.c | ||
| eeh_event.c | ||
| eeh_pe.c | ||
| eeh_sysfs.c | ||
| eeh.c | ||
| entry_32.S | ||
| entry_64.S | ||
| epapr_hcalls.S | ||
| epapr_paravirt.c | ||
| exceptions-64e.S | ||
| exceptions-64s.S | ||
| fadump.c | ||
| firmware.c | ||
| fpu.S | ||
| fsl_booke_entry_mapping.S | ||
| ftrace.c | ||
| head_8xx.S | ||
| head_32.S | ||
| head_40x.S | ||
| head_44x.S | ||
| head_64.S | ||
| head_booke.h | ||
| head_fsl_booke.S | ||
| hmi.c | ||
| hw_breakpoint.c | ||
| ibmebus.c | ||
| idle_6xx.S | ||
| idle_book3e.S | ||
| idle_book3s.S | ||
| idle_e500.S | ||
| idle_power4.S | ||
| idle.c | ||
| io-workarounds.c | ||
| io.c | ||
| iomap.c | ||
| iommu.c | ||
| irq.c | ||
| isa-bridge.c | ||
| jump_label.c | ||
| kgdb.c | ||
| kprobes.c | ||
| kvm_emul.S | ||
| kvm.c | ||
| l2cr_6xx.S | ||
| legacy_serial.c | ||
| machine_kexec_32.c | ||
| machine_kexec_64.c | ||
| machine_kexec.c | ||
| Makefile | ||
| mce_power.c | ||
| mce.c | ||
| misc_32.S | ||
| misc_64.S | ||
| misc.S | ||
| module_32.c | ||
| module_64.c | ||
| module.c | ||
| msi.c | ||
| nvram_64.c | ||
| of_platform.c | ||
| paca.c | ||
| pci_32.c | ||
| pci_64.c | ||
| pci_dn.c | ||
| pci_of_scan.c | ||
| pci-common.c | ||
| pci-hotplug.c | ||
| pmc.c | ||
| ppc32.h | ||
| ppc_ksyms_32.c | ||
| ppc_ksyms.c | ||
| ppc_save_regs.S | ||
| proc_powerpc.c | ||
| process.c | ||
| prom_init_check.sh | ||
| prom_init.c | ||
| prom_parse.c | ||
| prom.c | ||
| ptrace32.c | ||
| ptrace.c | ||
| reloc_32.S | ||
| reloc_64.S | ||
| rtas_flash.c | ||
| rtas_pci.c | ||
| rtas-proc.c | ||
| rtas-rtc.c | ||
| rtas.c | ||
| rtasd.c | ||
| setup_32.c | ||
| setup_64.c | ||
| setup-common.c | ||
| setup.h | ||
| signal_32.c | ||
| signal_64.c | ||
| signal.c | ||
| signal.h | ||
| smp-tbsync.c | ||
| smp.c | ||
| stacktrace.c | ||
| suspend.c | ||
| swsusp_32.S | ||
| swsusp_64.c | ||
| swsusp_asm64.S | ||
| swsusp_booke.S | ||
| swsusp.c | ||
| sys_ppc32.c | ||
| syscalls.c | ||
| sysfs.c | ||
| systbl_chk.c | ||
| systbl_chk.sh | ||
| systbl.S | ||
| tau_6xx.c | ||
| time.c | ||
| tm.S | ||
| trace_clock.c | ||
| traps.c | ||
| udbg_16550.c | ||
| udbg.c | ||
| uprobes.c | ||
| vdso.c | ||
| vecemu.c | ||
| vector.S | ||
| vio.c | ||
| vmlinux.lds.S | ||