Get rid of const warnings in XSERVER_INPUT_EVENT dtrace probe calls

Use typedefs to work around dtrace dropping const qualifiers from probe
arguments when generating Xserver-dtrace.h.   Add new probes.h header to
avoid having to replicate these typedefs in every file with dtrace probes.

Gets rid of these warnings from gcc 4.8:
 getevents.c:1096:9:
  warning: passing argument 6 of '__dtrace_Xserver___input__event' discards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1096:9:
  warning: passing argument 7 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1651:9:
  warning: passing argument 6 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1651:9:
  warning: passing argument 7 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1791:9:
  warning: passing argument 6 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1791:9:
  warning: passing argument 7 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1921:9:
  warning: passing argument 6 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]
 getevents.c:1921:9:
  warning: passing argument 7 of '__dtrace_Xserver___input__event' disards
  'const' qualifier from pointer target type [enabled by default]

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

5 files changed, 8 insertions, 22 deletions

diff --git a/dix/Xserver.d b/dix/Xserver.d
index 248d48e24..f4f229d84 100644
--- a/dix/Xserver.d
+++ b/dix/Xserver.d
@@ -31,6 +31,9 @@
 #include <sys/types.h>
 #endif
 
+typedef const uint8_t *const_uint8_p;
+typedef const double *const_double_p;
+
 provider Xserver {
 	/* reqType, data, length, client id, request buffer */
 	probe request__start(string, uint8_t, uint16_t, int, void *);
@@ -49,7 +52,7 @@ provider Xserver {
 	/* client id, event type, event* */
 	probe send__event(int, uint8_t, void *);
 	/* deviceid, type, button/keycode/touchid, flags, nvalues, mask, values */
-	probe input__event(int, int, uint32_t, uint32_t, int8_t, uint8_t*, double*);
+	probe input__event(int, int, uint32_t, uint32_t, int8_t, const_uint8_p, const_double_p);
 };
 
 #pragma D attributes Unstable/Unstable/Common provider Xserver provider
diff --git a/dix/dispatch.c b/dix/dispatch.c
index 9044ac786..17fa75e19 100644
--- a/dix/dispatch.c
+++ b/dix/dispatch.c
@@ -131,10 +131,7 @@ int ProcInitialConnection();
 
 #ifdef XSERVER_DTRACE
 #include "registry.h"
-#include <sys/types.h>
-typedef const char *string;
-
-#include "Xserver-dtrace.h"
+#include "probes.h"
 #endif
 
 #define mskcnt ((MAXCLIENTS + 31) / 32)
diff --git a/dix/events.c b/dix/events.c
index b8c67fdfc..c232ebadc 100644
--- a/dix/events.c
+++ b/dix/events.c
@@ -125,13 +125,7 @@ Equipment Corporation.
 #include <X11/extensions/XKBproto.h>
 #include "xkbsrv.h"
 #include "xace.h"
-
-#ifdef XSERVER_DTRACE
-#include <sys/types.h>
-typedef const char *string;
-
-#include "Xserver-dtrace.h"
-#endif
+#include "probes.h"
 
 #include <X11/extensions/XIproto.h>
 #include <X11/extensions/XI2proto.h>
diff --git a/dix/getevents.c b/dix/getevents.c
index 6fb12c5c1..bc7ffa63b 100644
--- a/dix/getevents.c
+++ b/dix/getevents.c
@@ -68,12 +68,7 @@
 #include "exevents.h"
 #include "extnsionst.h"
 #include "listdev.h"            /* for sizing up DeviceClassesChangedEvent */
-
-#if XSERVER_DTRACE
-#include <sys/types.h>
-typedef const char *string;
-#include <Xserver-dtrace.h>
-#endif
+#include "probes.h"
 
 /* Number of motion history events to store. */
 #define MOTION_HISTORY_SIZE 256
diff --git a/dix/resource.c b/dix/resource.c
index 26debdb00..964f0b306 100644
--- a/dix/resource.c
+++ b/dix/resource.c
@@ -144,10 +144,7 @@ Equipment Corporation.
 #include "gcstruct.h"
 
 #ifdef XSERVER_DTRACE
-#include <sys/types.h>
-typedef const char *string;
-
-#include "Xserver-dtrace.h"
+#include "probes.h"
 
 #define TypeNameString(t) LookupResourceName(t)
 #endif