[PATCH V6 5/7] perf/amd/iommu: Clean up perf_iommu_enable_event

[Suravee Suthikulpanit <Suravee.Suthikulpanit-5C7GfCeVMHo@public.gmane.org>]

This patch cleans up:
  * Various bitwise operations in perf_iommu_enable_event
  * Make use macros BIT(x)

This should not affect logic and functionality.

Cc: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
---
 arch/x86/events/amd/iommu.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index 9bff41d..2403c78 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -258,21 +258,21 @@ static void perf_iommu_enable_event(struct perf_event *ev)
 	amd_iommu_pc_set_reg(0, devid, bank, cntr,
 			     IOMMU_PC_COUNTER_SRC_REG, &reg);
 
-	reg = 0ULL | devid | (_GET_DEVID_MASK(ev) << 32);
+	reg = devid | (_GET_DEVID_MASK(ev) << 32);
 	if (reg)
-		reg |= (1UL << 31);
+		reg |= BIT(31);
 	amd_iommu_pc_set_reg(0, devid, bank, cntr,
 			     IOMMU_PC_DEVID_MATCH_REG, &reg);
 
-	reg = 0ULL | _GET_PASID(ev) | (_GET_PASID_MASK(ev) << 32);
+	reg = _GET_PASID(ev) | (_GET_PASID_MASK(ev) << 32);
 	if (reg)
-		reg |= (1UL << 31);
+		reg |= BIT(31);
 	amd_iommu_pc_set_reg(0, devid, bank, cntr,
 			     IOMMU_PC_PASID_MATCH_REG, &reg);
 
-	reg = 0ULL | _GET_DOMID(ev) | (_GET_DOMID_MASK(ev) << 32);
+	reg = _GET_DOMID(ev) | (_GET_DOMID_MASK(ev) << 32);
 	if (reg)
-		reg |= (1UL << 31);
+		reg |= BIT(31);
 	amd_iommu_pc_set_reg(0, devid, bank, cntr,
 			     IOMMU_PC_DOMID_MATCH_REG, &reg);
 }
-- 
1.8.3.1