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MIPS: refactor the runtime coherent vs noncoherent DMA indicators

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Replace the global coherentio enum, and the hw_coherentio (fake) boolean
variables with a single boolean dma_default_coherent flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Christoph Hellwig
2021-02-10 10:56:38 +01:00
committed by Thomas Bogendoerfer
parent 3440caf5f2
commit 14ac09a65e
6 changed files with 16 additions and 40 deletions
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10
arch/mips/kernel/setup.c
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@@ -803,14 +803,12 @@ arch_initcall(debugfs_mips);
#endif
#ifdef CONFIG_DMA_MAYBE_COHERENT
/* User defined DMA coherency from command line. */
enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
EXPORT_SYMBOL_GPL(coherentio);
int hw_coherentio; /* Actual hardware supported DMA coherency setting. */
bool dma_default_coherent;
EXPORT_SYMBOL_GPL(dma_default_coherent);
static int __init setcoherentio(char *str)
{
coherentio = IO_COHERENCE_ENABLED;
dma_default_coherent = true;
pr_info("Hardware DMA cache coherency (command line)\n");
return 0;
}
@@ -818,7 +816,7 @@ early_param("coherentio", setcoherentio);
static int __init setnocoherentio(char *str)
{
coherentio = IO_COHERENCE_DISABLED;
dma_default_coherent = true;
pr_info("Software DMA cache coherency (command line)\n");
return 0;
}