cpu: multiple: change size_t to ptrdiff_t for_sbrk_r

cpu/lpc1768/syscalls.c

@@ -73,7 +73,7 @@ void __assert(const char *file, int line, const char *failedexpr)
     __assert_func(file, line, "?", failedexpr);
 }
 /*-----------------------------------------------------------------------------------*/
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     if(incr < 0)
     {

cpu/lpc_common/lpc_syscalls.c

@@ -44,7 +44,7 @@ void heap_stats(void)
 }
 
 /*-----------------------------------------------------------------------------------*/
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     uint32_t cpsr = disableIRQ();
 

cpu/mc1322x/mc1322x_syscalls.c

@@ -24,7 +24,7 @@ static const caddr_t heap_max = (caddr_t)&__heap_end;
 static const caddr_t heap_start = (caddr_t)&__heap_start;
 
 /*-----------------------------------------------------------------------------------*/
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     uint32_t cpsr = disableIRQ();
 

cpu/nrf51822/syscalls.c

@@ -84,7 +84,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;

cpu/sam3x8e/syscalls.c

@@ -84,7 +84,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;

cpu/stm32f0/syscalls.c

@@ -84,7 +84,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;

cpu/stm32f1/syscalls.c

@@ -87,7 +87,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;

cpu/stm32f3/syscalls.c

@@ -106,7 +106,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;

cpu/stm32f4/syscalls.c

@@ -83,7 +83,7 @@ void _exit(int n)
  *
  * @return [description]
  */
-caddr_t _sbrk_r(struct _reent *r, size_t incr)
+caddr_t _sbrk_r(struct _reent *r, ptrdiff_t incr)
 {
     unsigned int state = disableIRQ();
     caddr_t res = heap_top;