style: change NULL to nullptr in syscall files

Change-Id: I02719f3572f6665cace1eb5681f297dcde9e71ce
Reviewed-on: https://gem5-review.googlesource.com/2271
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Michael LeBeane <Michael.Lebeane@amd.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index 4cf17a266..8736176ed 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -889,7 +889,7 @@ setpgidFunc(SyscallDesc *desc, int callnum, Process *process,
         return 0;
     }
 
-    Process *matched_ph = NULL;
+    Process *matched_ph = nullptr;
     System *sysh = tc->getSystemPtr();
 
     // Retrieves process pointer from active/suspended thread contexts.
@@ -903,7 +903,7 @@ setpgidFunc(SyscallDesc *desc, int callnum, Process *process,
         }
     }
 
-    assert(matched_ph != NULL);
+    assert(matched_ph);
     matched_ph->setpgid((pgid == 0) ? matched_ph->pid() : pgid);
 
     return 0;