[COMMITTED PATCH] Use unsigned types for counters in AIO code.

[Roland McGrath <roland at hack dot frob dot com>]

Verified on x86_64-linux-gnu, i686-linux-gnu, and arm-linux-gnueabihf, that
no generated code changes nontrivially.


Thanks,
Roland


2015-06-24  Roland McGrath  <roland@hack.frob.com>

	* sysdeps/pthread/aio_misc.h (struct waitlist): Change type of field
	counterp to 'volatile unsigned int *'.
	* sysdeps/pthread/aio_suspend.c [DONT_NEED_AIO_MISC_COND]
	(do_aio_misc_wait): Give argument CNTR type 'unsigned int *'.
	(aio_suspend): Give local variable CNTR type 'unsigned int'.
	* sysdeps/pthread/lio_listio.c (lio_listio_internal):
	Give local variable TOTAL type 'volatile unsigned int'.
	(struct async_waitlist): Change type of field counter to 'unsigned int'.

diff --git a/sysdeps/nptl/aio_misc.h b/sysdeps/nptl/aio_misc.h
index fb69b0f..d5d1c08 100644
--- a/sysdeps/nptl/aio_misc.h
+++ b/sysdeps/nptl/aio_misc.h
@@ -34,8 +34,8 @@
 
 #define AIO_MISC_WAIT(result, futex, timeout, cancel)			      \
   do {									      \
-    volatile int *futexaddr = &futex;					      \
-    int oldval = futex;							      \
+    volatile unsigned int *futexaddr = &futex;				      \
+    unsigned int oldval = futex;					      \
 									      \
     if (oldval != 0)							      \
       {									      \
diff --git a/sysdeps/pthread/aio_misc.h b/sysdeps/pthread/aio_misc.h
index ffb0983..5d3fb61 100644
--- a/sysdeps/pthread/aio_misc.h
+++ b/sysdeps/pthread/aio_misc.h
@@ -51,7 +51,7 @@ struct waitlist
 #endif
     int *result;
 
-    volatile int *counterp;
+    volatile unsigned int *counterp;
     /* The next field is used in asynchronous `lio_listio' operations.  */
     struct sigevent *sigevp;
 #ifdef BROKEN_THREAD_SIGNALS
diff --git a/sysdeps/pthread/aio_suspend.c b/sysdeps/pthread/aio_suspend.c
index 920f18a..641eafb 100644
--- a/sysdeps/pthread/aio_suspend.c
+++ b/sysdeps/pthread/aio_suspend.c
@@ -94,13 +94,13 @@ cleanup (void *arg)
 #ifdef DONT_NEED_AIO_MISC_COND
 static int
 __attribute__ ((noinline))
-do_aio_misc_wait(int *cntr, const struct timespec *timeout)
+do_aio_misc_wait (unsigned int *cntr, const struct timespec *timeout)
 {
-	int result = 0;
+  int result = 0;
 
-	AIO_MISC_WAIT(result, *cntr, timeout, 1);
+  AIO_MISC_WAIT (result, *cntr, timeout, 1);
 
-	return result;
+  return result;
 }
 #endif
 
@@ -124,7 +124,7 @@ aio_suspend (list, nent, timeout)
   int cnt;
   bool any = false;
   int result = 0;
-  int cntr = 1;
+  unsigned int cntr = 1;
 
   /* Request the mutex.  */
   pthread_mutex_lock (&__aio_requests_mutex);
@@ -180,7 +180,7 @@ aio_suspend (list, nent, timeout)
       pthread_cleanup_push (cleanup, &clparam);
 
 #ifdef DONT_NEED_AIO_MISC_COND
-      result = do_aio_misc_wait(&cntr, timeout);
+      result = do_aio_misc_wait (&cntr, timeout);
 #else
       if (timeout == NULL)
 	result = pthread_cond_wait (&cond, &__aio_requests_mutex);
diff --git a/sysdeps/pthread/lio_listio.c b/sysdeps/pthread/lio_listio.c
index bfbf221..ac7ce40 100644
--- a/sysdeps/pthread/lio_listio.c
+++ b/sysdeps/pthread/lio_listio.c
@@ -35,7 +35,7 @@
 /* We need this special structure to handle asynchronous I/O.  */
 struct async_waitlist
   {
-    int counter;
+    unsigned int counter;
     struct sigevent sigev;
     struct waitlist list[0];
   };
@@ -61,7 +61,7 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent,
   struct sigevent defsigev;
   struct requestlist *requests[nent];
   int cnt;
-  volatile int total = 0;
+  volatile unsigned int total = 0;
   int result = 0;
 
   if (sig == NULL)
@@ -83,7 +83,7 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent,
 
 	requests[cnt] = __aio_enqueue_request ((aiocb_union *) list[cnt],
 					       (list[cnt]->aio_lio_opcode
-					        | LIO_OPCODE_BASE));
+						| LIO_OPCODE_BASE));
 
 	if (requests[cnt] != NULL)
 	  /* Successfully enqueued.  */