diff --git a/drivers/bus/acpi/acpica/dispatcher/dscontrol.c b/drivers/bus/acpi/acpica/dispatcher/dscontrol.c
index fda3db6f294..9c04f2b389e 100644
--- a/drivers/bus/acpi/acpica/dispatcher/dscontrol.c
+++ b/drivers/bus/acpi/acpica/dispatcher/dscontrol.c
@@ -102,7 +102,7 @@ AcpiDsExecBeginControlOp (
             }
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case AML_IF_OP:
         /*
diff --git a/drivers/bus/acpi/acpica/dispatcher/dsdebug.c b/drivers/bus/acpi/acpica/dispatcher/dsdebug.c
index e7110e6017a..951346a12c4 100644
--- a/drivers/bus/acpi/acpica/dispatcher/dsdebug.c
+++ b/drivers/bus/acpi/acpica/dispatcher/dsdebug.c
@@ -146,7 +146,7 @@ AcpiDsDumpMethodStack (
 
     /* Ignore control codes, they are not errors */
 
-    if ((Status & AE_CODE_MASK) == AE_CODE_CONTROL)
+    if (ACPI_CNTL_EXCEPTION (Status))
     {
         return_VOID;
     }
diff --git a/drivers/bus/acpi/acpica/dispatcher/dswexec.c b/drivers/bus/acpi/acpica/dispatcher/dswexec.c
index d9d79be2080..3057a9329d3 100644
--- a/drivers/bus/acpi/acpica/dispatcher/dswexec.c
+++ b/drivers/bus/acpi/acpica/dispatcher/dswexec.c
@@ -664,8 +664,7 @@ AcpiDsExecEndOp (
                     break;
                 }
 
-                /* Fall through */
-                /*lint -fallthrough */
+                ACPI_FALLTHROUGH;
 
             case AML_INT_EVAL_SUBTREE_OP:
 
diff --git a/drivers/bus/acpi/acpica/dispatcher/dswload.c b/drivers/bus/acpi/acpica/dispatcher/dswload.c
index d3e11bc661e..62fd6e40481 100644
--- a/drivers/bus/acpi/acpica/dispatcher/dswload.c
+++ b/drivers/bus/acpi/acpica/dispatcher/dswload.c
@@ -267,7 +267,7 @@ AcpiDsLoad1BeginOp (
                 break;
             }
 
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         default:
 
diff --git a/drivers/bus/acpi/acpica/dispatcher/dswload2.c b/drivers/bus/acpi/acpica/dispatcher/dswload2.c
index a916eec7fd9..4e69244de27 100644
--- a/drivers/bus/acpi/acpica/dispatcher/dswload2.c
+++ b/drivers/bus/acpi/acpica/dispatcher/dswload2.c
@@ -258,7 +258,7 @@ AcpiDsLoad2BeginOp (
                 break;
             }
 
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         default:
 
diff --git a/drivers/bus/acpi/acpica/executer/exfldio.c b/drivers/bus/acpi/acpica/executer/exfldio.c
index c6fc6e0a496..ece5c19ba57 100644
--- a/drivers/bus/acpi/acpica/executer/exfldio.c
+++ b/drivers/bus/acpi/acpica/executer/exfldio.c
@@ -508,7 +508,7 @@ AcpiExFieldDatumIo (
          * RegionField case and write the datum to the Operation Region
          */
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_TYPE_LOCAL_REGION_FIELD:
         /*
diff --git a/drivers/bus/acpi/acpica/executer/exresop.c b/drivers/bus/acpi/acpica/executer/exresop.c
index e387a16de61..35f0f3a63f1 100644
--- a/drivers/bus/acpi/acpica/executer/exresop.c
+++ b/drivers/bus/acpi/acpica/executer/exresop.c
@@ -250,7 +250,7 @@ AcpiExResolveOperands (
 
                     TargetOp = AML_DEBUG_OP;
 
-                    /*lint -fallthrough */
+                    ACPI_FALLTHROUGH;
 
                 case ACPI_REFCLASS_ARG:
                 case ACPI_REFCLASS_LOCAL:
@@ -314,7 +314,7 @@ AcpiExResolveOperands (
              * Else not a string - fall through to the normal Reference
              * case below
              */
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         case ARGI_REFERENCE:            /* References: */
         case ARGI_INTEGER_REF:
diff --git a/drivers/bus/acpi/acpica/executer/exstore.c b/drivers/bus/acpi/acpica/executer/exstore.c
index 4e1cc8415a4..cb791ff2f68 100644
--- a/drivers/bus/acpi/acpica/executer/exstore.c
+++ b/drivers/bus/acpi/acpica/executer/exstore.c
@@ -140,7 +140,7 @@ AcpiExStore (
             return_ACPI_STATUS (AE_OK);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     default:
 
@@ -477,7 +477,7 @@ AcpiExStoreObjectToNode (
                 break;
             }
 
-        /* Fallthrough */
+            ACPI_FALLTHROUGH;
 
         case ACPI_TYPE_DEVICE:
         case ACPI_TYPE_EVENT:
diff --git a/drivers/bus/acpi/acpica/hardware/hwgpe.c b/drivers/bus/acpi/acpica/hardware/hwgpe.c
index 69061928726..63f1335e225 100644
--- a/drivers/bus/acpi/acpica/hardware/hwgpe.c
+++ b/drivers/bus/acpi/acpica/hardware/hwgpe.c
@@ -146,7 +146,7 @@ AcpiHwLowSetGpe (
             return (AE_BAD_PARAMETER);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_GPE_ENABLE:
 
diff --git a/drivers/bus/acpi/acpica/include/acexcep.h b/drivers/bus/acpi/acpica/include/acexcep.h
index 194f3a82732..e888ec9b2b4 100644
--- a/drivers/bus/acpi/acpica/include/acexcep.h
+++ b/drivers/bus/acpi/acpica/include/acexcep.h
@@ -96,11 +96,11 @@ typedef struct acpi_exception_info
 
 #define AE_OK                           (ACPI_STATUS) 0x0000
 
-#define ACPI_ENV_EXCEPTION(Status)      (Status & AE_CODE_ENVIRONMENTAL)
-#define ACPI_AML_EXCEPTION(Status)      (Status & AE_CODE_AML)
-#define ACPI_PROG_EXCEPTION(Status)     (Status & AE_CODE_PROGRAMMER)
-#define ACPI_TABLE_EXCEPTION(Status)    (Status & AE_CODE_ACPI_TABLES)
-#define ACPI_CNTL_EXCEPTION(Status)     (Status & AE_CODE_CONTROL)
+#define ACPI_ENV_EXCEPTION(Status)      (((Status) & AE_CODE_MASK) == AE_CODE_ENVIRONMENTAL)
+#define ACPI_AML_EXCEPTION(Status)      (((Status) & AE_CODE_MASK) == AE_CODE_AML)
+#define ACPI_PROG_EXCEPTION(Status)     (((Status) & AE_CODE_MASK) == AE_CODE_PROGRAMMER)
+#define ACPI_TABLE_EXCEPTION(Status)    (((Status) & AE_CODE_MASK) == AE_CODE_ACPI_TABLES)
+#define ACPI_CNTL_EXCEPTION(Status)     (((Status) & AE_CODE_MASK) == AE_CODE_CONTROL)
 
 
 /*
diff --git a/drivers/bus/acpi/acpica/include/acpixf.h b/drivers/bus/acpi/acpica/include/acpixf.h
index 3c7ab0f7862..a3d25ab4d0d 100644
--- a/drivers/bus/acpi/acpica/include/acpixf.h
+++ b/drivers/bus/acpi/acpica/include/acpixf.h
@@ -46,7 +46,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20201113
+#define ACPI_CA_VERSION                 0x20201217
 
 #include "acconfig.h"
 #include "actypes.h"
diff --git a/drivers/bus/acpi/acpica/include/actypes.h b/drivers/bus/acpi/acpica/include/actypes.h
index 46d934635db..e4d7be2ba69 100644
--- a/drivers/bus/acpi/acpica/include/actypes.h
+++ b/drivers/bus/acpi/acpica/include/actypes.h
@@ -1429,5 +1429,10 @@ typedef enum
 
 #define ACPI_OPT_END                    -1
 
+/* Definitions for explicit fallthrough */
+
+#ifndef ACPI_FALLTHROUGH
+#define ACPI_FALLTHROUGH do {} while(0)
+#endif
 
 #endif /* __ACTYPES_H__ */
diff --git a/drivers/bus/acpi/acpica/include/platform/acgcc.h b/drivers/bus/acpi/acpica/include/platform/acgcc.h
index ca5e6c42842..9fa10fd6139 100644
--- a/drivers/bus/acpi/acpica/include/platform/acgcc.h
+++ b/drivers/bus/acpi/acpica/include/platform/acgcc.h
@@ -88,6 +88,21 @@ typedef __builtin_va_list       va_list;
 
 #define ACPI_USE_NATIVE_MATH64
 
+/* GCC did not support __has_attribute until 5.1. */
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+/*
+ * Explictly mark intentional explicit fallthrough to silence
+ * -Wimplicit-fallthrough in GCC 7.1+.
+ */
+
+#if __has_attribute(__fallthrough__)
+#define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
+#endif
+
 #ifdef __REACTOS__
 /* Flush CPU cache - used when going to sleep. Wbinvd or similar. */
 
diff --git a/drivers/bus/acpi/acpica/parser/psloop.c b/drivers/bus/acpi/acpica/parser/psloop.c
index 22c11a318b5..305af2305e8 100644
--- a/drivers/bus/acpi/acpica/parser/psloop.c
+++ b/drivers/bus/acpi/acpica/parser/psloop.c
@@ -302,8 +302,7 @@ AcpiPsParseLoop (
                  */
                 WalkState->Op = NULL;
                 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE));
-                if (ACPI_FAILURE (Status) &&
-                    ((Status & AE_CODE_MASK) != AE_CODE_CONTROL))
+                if (ACPI_FAILURE (Status) && !ACPI_CNTL_EXCEPTION (Status))
                 {
                     if (Status == AE_AML_NO_RETURN_VALUE)
                     {
diff --git a/drivers/bus/acpi/acpica/parser/psparse.c b/drivers/bus/acpi/acpica/parser/psparse.c
index 97c7be4d49f..9d934d35108 100644
--- a/drivers/bus/acpi/acpica/parser/psparse.c
+++ b/drivers/bus/acpi/acpica/parser/psparse.c
@@ -425,7 +425,7 @@ AcpiPsNextParseState (
     default:
 
         Status = CallbackStatus;
-        if ((CallbackStatus & AE_CODE_MASK) == AE_CODE_CONTROL)
+        if (ACPI_CNTL_EXCEPTION (CallbackStatus))
         {
             Status = AE_OK;
         }
diff --git a/drivers/bus/acpi/acpica/utilities/utdelete.c b/drivers/bus/acpi/acpica/utilities/utdelete.c
index a816dc7ea42..d7bcaff00eb 100644
--- a/drivers/bus/acpi/acpica/utilities/utdelete.c
+++ b/drivers/bus/acpi/acpica/utilities/utdelete.c
@@ -158,7 +158,7 @@ AcpiUtDeleteInternalObj (
             (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_TYPE_PROCESSOR:
     case ACPI_TYPE_THERMAL:
diff --git a/drivers/bus/acpi/acpica/utilities/utstrsuppt.c b/drivers/bus/acpi/acpica/utilities/utstrsuppt.c
index 1a660c743b8..9f9ae123c0d 100644
--- a/drivers/bus/acpi/acpica/utilities/utstrsuppt.c
+++ b/drivers/bus/acpi/acpica/utilities/utstrsuppt.c
@@ -166,7 +166,7 @@ AcpiUtConvertDecimalString (
          * 1) Runtime: terminate with no error, per the ACPI spec
          * 2) Compiler: return an error
          */
-        if (!isdigit (*String))
+        if (!isdigit ((int) *String))
         {
 #ifdef ACPI_ASL_COMPILER
             Status = AE_BAD_DECIMAL_CONSTANT;
@@ -228,7 +228,7 @@ AcpiUtConvertHexString (
          * 1) Runtime: terminate with no error, per the ACPI spec
          * 2) Compiler: return an error
          */
-        if (!isxdigit (*String))
+        if (!isxdigit ((int) *String))
         {
 #ifdef ACPI_ASL_COMPILER
             Status = AE_BAD_HEX_CONSTANT;
diff --git a/media/doc/3rd Party Files.txt b/media/doc/3rd Party Files.txt
index 4c5aa82804f..946ae6a5c6e 100644
--- a/media/doc/3rd Party Files.txt	
+++ b/media/doc/3rd Party Files.txt	
@@ -69,7 +69,7 @@ URL: https://gitlab.freedesktop.org/mesa/glu, ftp://ftp.freedesktop.org/pub/mesa
 
 Title: ACPICA
 Path: drivers/bus/acpi/acpica
-Used Version: 20201113
+Used Version: 20201217
 License: GPL-2.0 (https://spdx.org/licenses/GPL-2.0.html)
 URL: https://acpica.org/