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iommu: remove iommu_set_cmd_line_dma_api and iommu_cmd_line_dma_api 

Don't obsfucate the trivial bit flag check.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210401155256.298656-18-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Christoph Hellwig 2021-04-01 17:52:53 +02:00 committed by Joerg Roedel
parent 7e14754778
commit 3189713a1b
1 changed files with 5 additions and 18 deletions
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23
drivers/iommu/iommu.c
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@ -70,16 +70,6 @@ static const char * const iommu_group_resv_type_string[] = {
#define IOMMU_CMD_LINE_DMA_API BIT(0)
static void iommu_set_cmd_line_dma_api(void)
{
iommu_cmd_line |= IOMMU_CMD_LINE_DMA_API;
}
static bool iommu_cmd_line_dma_api(void)
{
return !!(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API);
}
static int iommu_alloc_default_domain(struct iommu_group *group,
struct device *dev);
static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
@ -130,9 +120,7 @@ static const char *iommu_domain_type_str(unsigned int t)
static int __init iommu_subsys_init(void)
{
bool cmd_line = iommu_cmd_line_dma_api();
if (!cmd_line) {
if (!(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API)) {
if (IS_ENABLED(CONFIG_IOMMU_DEFAULT_PASSTHROUGH))
iommu_set_default_passthrough(false);
else
@ -146,7 +134,8 @@ static int __init iommu_subsys_init(void)
pr_info("Default domain type: %s %s\n",
iommu_domain_type_str(iommu_def_domain_type),
cmd_line ? "(set via kernel command line)" : "");
(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API) ?
"(set via kernel command line)" : "");
return 0;
}
@ -2757,16 +2746,14 @@ EXPORT_SYMBOL_GPL(iommu_alloc_resv_region);
void iommu_set_default_passthrough(bool cmd_line)
{
if (cmd_line)
iommu_set_cmd_line_dma_api();
iommu_cmd_line |= IOMMU_CMD_LINE_DMA_API;
iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
}
void iommu_set_default_translated(bool cmd_line)
{
if (cmd_line)
iommu_set_cmd_line_dma_api();
iommu_cmd_line |= IOMMU_CMD_LINE_DMA_API;
iommu_def_domain_type = IOMMU_DOMAIN_DMA;
}