Messages in this thread Patch in this message | | | From | Victor Aoqui <> | Subject | [PATCH] powerpc/kernel: Avoid preemption check during iommu_range_alloc | Date | Thu, 20 Jul 2017 14:26:06 -0300 |
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Replaced __this_cpu_read function call by raw_cpu_read in iommu_range_alloc function. Preemption doesn't need to be disabled since any CPU can safely use IOMMU pool.
Signed-off-by: Victor Aoqui <victora@linux.vnet.ibm.com> --- arch/powerpc/kernel/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 233ca3f..0e49a45 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -208,7 +208,7 @@ static unsigned long iommu_range_alloc(struct device *dev, * We don't need to disable preemption here because any CPU can * safely use any IOMMU pool. */ - pool_nr = __this_cpu_read(iommu_pool_hash) & (tbl->nr_pools - 1); + pool_nr = raw_cpu_read(iommu_pool_hash) & (tbl->nr_pools - 1); if (largealloc) pool = &(tbl->large_pool); -- 1.8.3.1
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