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iommu/vt-d: Fix linker error on 32-bit

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A recent commit broke the build on 32-bit x86. The linker throws these
messages:

	ld: drivers/iommu/intel/perf.o: in function `dmar_latency_snapshot':
	perf.c:(.text+0x40c): undefined reference to `__udivdi3'
	ld: perf.c:(.text+0x458): undefined reference to `__udivdi3'

The reason are the 64-bit divides in dmar_latency_snapshot(). Use the
div_u64() helper function for those.

Fixes: 55ee5e67a5 ("iommu/vt-d: Add common code for dmar latency performance monitors")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20210610083120.29224-1-joro@8bytes.org
This commit is contained in:
Joerg Roedel 2021-06-10 10:31:20 +02:00
parent 7a0f06c197
commit d6a9642bd6
1 changed files with 3 additions and 3 deletions
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6
drivers/iommu/intel/perf.c
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@ -141,14 +141,14 @@ int dmar_latency_snapshot(struct intel_iommu *iommu, char *str, size_t size)
if (val == UINT_MAX)
val = 0;
else
val /= 1000;
val = div_u64(val, 1000);
break;
case COUNTS_MAX:
val /= 1000;
val = div_u64(val, 1000);
break;
case COUNTS_SUM:
if (lstat[i].samples)
val /= (lstat[i].samples * 1000);
val = div_u64(val, (lstat[i].samples * 1000));
else
val = 0;
break;