RE: [PATCH] ACPICA: fix -Wfallthrough
From: Moore, Robert
Date: Fri Nov 13 2020 - 16:27:49 EST
-----Original Message-----
From: ndesaulniers via sendgmr <ndesaulniers@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> On Behalf Of Nick Desaulniers
Sent: Tuesday, November 10, 2020 6:12 PM
To: Moore, Robert <robert.moore@xxxxxxxxx>; Kaneda, Erik <erik.kaneda@xxxxxxxxx>; Wysocki, Rafael J <rafael.j.wysocki@xxxxxxxxx>; Gustavo A . R . Silva <gustavoars@xxxxxxxxxx>
Cc: clang-built-linux@xxxxxxxxxxxxxxxx; Nick Desaulniers <ndesaulniers@xxxxxxxxxx>; Len Brown <lenb@xxxxxxxxxx>; linux-acpi@xxxxxxxxxxxxxxx; devel@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: [PATCH] ACPICA: fix -Wfallthrough
The "fallthrough" pseudo-keyword was added as a portable way to denote intentional fallthrough. This code seemed to be using a mix of fallthrough comments that GCC recognizes, and some kind of lint marker.
I'm guessing that linter hasn't been run in a while from the mixed use of the marker vs comments.
/*lint -fallthrough */
This is the lint marker
BTW, what version of gcc added -Wfallthrough?
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
drivers/acpi/acpica/dscontrol.c | 3 +--
drivers/acpi/acpica/dswexec.c | 4 +---
drivers/acpi/acpica/dswload.c | 3 +--
drivers/acpi/acpica/dswload2.c | 3 +--
drivers/acpi/acpica/exfldio.c | 3 +--
drivers/acpi/acpica/exresop.c | 5 ++---
drivers/acpi/acpica/exstore.c | 6 ++----
drivers/acpi/acpica/hwgpe.c | 3 +--
drivers/acpi/acpica/utdelete.c | 3 +--
drivers/acpi/acpica/utprint.c | 2 +-
10 files changed, 12 insertions(+), 23 deletions(-)
diff --git a/drivers/acpi/acpica/dscontrol.c b/drivers/acpi/acpica/dscontrol.c index 4b5b6e859f62..1e75e5fbfd19 100644
--- a/drivers/acpi/acpica/dscontrol.c
+++ b/drivers/acpi/acpica/dscontrol.c
@@ -61,8 +61,7 @@ acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state,
break;
}
}
-
- /*lint -fallthrough */
+ fallthrough;
case AML_IF_OP:
/*
diff --git a/drivers/acpi/acpica/dswexec.c b/drivers/acpi/acpica/dswexec.c index 1d4f8c81028c..e8c32d4fe55f 100644
--- a/drivers/acpi/acpica/dswexec.c
+++ b/drivers/acpi/acpica/dswexec.c
@@ -597,9 +597,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
if (ACPI_FAILURE(status)) {
break;
}
-
- /* Fall through */
- /*lint -fallthrough */
+ fallthrough;
case AML_INT_EVAL_SUBTREE_OP:
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c index 27069325b6de..afc663c3742d 100644
--- a/drivers/acpi/acpica/dswload.c
+++ b/drivers/acpi/acpica/dswload.c
@@ -223,8 +223,7 @@ acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
break;
}
-
- /*lint -fallthrough */
+ fallthrough;
default:
diff --git a/drivers/acpi/acpica/dswload2.c b/drivers/acpi/acpica/dswload2.c index edadbe146506..1b794b6ba072 100644
--- a/drivers/acpi/acpica/dswload2.c
+++ b/drivers/acpi/acpica/dswload2.c
@@ -213,8 +213,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
break;
}
-
- /*lint -fallthrough */
+ fallthrough;
default:
diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c index ade35ff1c7ba..9d1cabe0fed9 100644
--- a/drivers/acpi/acpica/exfldio.c
+++ b/drivers/acpi/acpica/exfldio.c
@@ -433,8 +433,7 @@ acpi_ex_field_datum_io(union acpi_operand_object *obj_desc,
* Now that the Bank has been selected, fall through to the
* region_field case and write the datum to the Operation Region
*/
-
- /*lint -fallthrough */
+ fallthrough;
case ACPI_TYPE_LOCAL_REGION_FIELD:
/*
diff --git a/drivers/acpi/acpica/exresop.c b/drivers/acpi/acpica/exresop.c index 4d1b22971d58..df48faa9a551 100644
--- a/drivers/acpi/acpica/exresop.c
+++ b/drivers/acpi/acpica/exresop.c
@@ -197,8 +197,7 @@ acpi_ex_resolve_operands(u16 opcode,
case ACPI_REFCLASS_DEBUG:
target_op = AML_DEBUG_OP;
-
- /*lint -fallthrough */
+ fallthrough;
case ACPI_REFCLASS_ARG:
case ACPI_REFCLASS_LOCAL:
@@ -264,7 +263,7 @@ acpi_ex_resolve_operands(u16 opcode,
* Else not a string - fall through to the normal Reference
* case below
*/
- /*lint -fallthrough */
+ fallthrough;
case ARGI_REFERENCE: /* References: */
case ARGI_INTEGER_REF:
diff --git a/drivers/acpi/acpica/exstore.c b/drivers/acpi/acpica/exstore.c index 3adc0a29d890..2067baa7c120 100644
--- a/drivers/acpi/acpica/exstore.c
+++ b/drivers/acpi/acpica/exstore.c
@@ -95,8 +95,7 @@ acpi_ex_store(union acpi_operand_object *source_desc,
if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
return_ACPI_STATUS(AE_OK);
}
-
- /*lint -fallthrough */
+ fallthrough;
default:
@@ -421,8 +420,7 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
}
break;
}
-
- /* Fallthrough */
+ fallthrough;
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_EVENT:
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c index b13a4ed5bc63..fbfad80c8a53 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -166,8 +166,7 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
if (!(register_bit & gpe_register_info->enable_mask)) {
return (AE_BAD_PARAMETER);
}
-
- /*lint -fallthrough */
+ fallthrough;
case ACPI_GPE_ENABLE:
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c index 4c0d4e434196..8076e7947585 100644
--- a/drivers/acpi/acpica/utdelete.c
+++ b/drivers/acpi/acpica/utdelete.c
@@ -111,8 +111,7 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
(void)acpi_ev_delete_gpe_block(object->device.
gpe_block);
}
-
- /*lint -fallthrough */
+ fallthrough;
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
diff --git a/drivers/acpi/acpica/utprint.c b/drivers/acpi/acpica/utprint.c index 681c11f4af4e..f7e43baf5ff2 100644
--- a/drivers/acpi/acpica/utprint.c
+++ b/drivers/acpi/acpica/utprint.c
@@ -475,7 +475,7 @@ int vsnprintf(char *string, acpi_size size, const char *format, va_list args)
case 'X':
type |= ACPI_FORMAT_UPPER;
- /* FALLTHROUGH */
+ fallthrough;
case 'x':
--
2.29.2.222.g5d2a92d10f8-goog