[PATCH v5 08/10] xen/arm: smmuv3: Use fallthrough pseudo-keyword

[Rahul Singh <rahul.singh@xxxxxxx>]

Backport commit df561f6688fef775baa341a0f5d960becd248b11
"treewide: Use fallthrough pseudo-keyword" from Linux kernel.

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
---
Changes since v3:
 - This patch is introduce in this version.
Changes since v4:
 - Add more information about the merged patch in commit message.
---
---
 xen/drivers/passthrough/arm/smmu-v3.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/xen/drivers/passthrough/arm/smmu-v3.c 
b/xen/drivers/passthrough/arm/smmu-v3.c
index 5ce14850b4..f5f8b4c981 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -932,7 +932,6 @@ static void arm_smmu_cmdq_skip_err(struct arm_smmu_device 
*smmu)
                 */
                return;
        case CMDQ_ERR_CERROR_ILL_IDX:
-               /* Fallthrough */
        default:
                break;
        }
@@ -2488,7 +2487,7 @@ static int arm_smmu_device_hw_probe(struct 
arm_smmu_device *smmu)
        switch (FIELD_GET(IDR0_STALL_MODEL, reg)) {
        case IDR0_STALL_MODEL_FORCE:
                smmu->features |= ARM_SMMU_FEAT_STALL_FORCE;
-               /* Fallthrough */
+               fallthrough;
        case IDR0_STALL_MODEL_STALL:
                smmu->features |= ARM_SMMU_FEAT_STALLS;
        }
@@ -2505,7 +2504,7 @@ static int arm_smmu_device_hw_probe(struct 
arm_smmu_device *smmu)
        switch (FIELD_GET(IDR0_TTF, reg)) {
        case IDR0_TTF_AARCH32_64:
                smmu->ias = 40;
-               /* Fallthrough */
+               fallthrough;
        case IDR0_TTF_AARCH64:
                break;
        default:
@@ -2589,7 +2588,7 @@ static int arm_smmu_device_hw_probe(struct 
arm_smmu_device *smmu)
        default:
                dev_info(smmu->dev,
                        "unknown output address size. Truncating to 48-bit\n");
-               /* Fallthrough */
+               fallthrough;
        case IDR5_OAS_48_BIT:
                smmu->oas = 48;
        }
-- 
2.17.1