misc: Fix a number of unitialised variables and members

Static analysis unearther a bunch of uninitialised variables and
members, and this patch addresses the problem. In all cases these
omissions seem benign in the end, but at least fixing them means less
false positives next time round.

2 files changed, 4 insertions, 2 deletions

diff --git a/src/mem/cache/prefetch/base.cc b/src/mem/cache/prefetch/base.cc
index 57c1424bf..971ecf5b0 100644
--- a/src/mem/cache/prefetch/base.cc
+++ b/src/mem/cache/prefetch/base.cc
@@ -57,7 +57,8 @@
 #include "sim/system.hh"
 
 BasePrefetcher::BasePrefetcher(const Params *p)
-    : ClockedObject(p), size(p->size), latency(p->latency), degree(p->degree),
+    : ClockedObject(p), size(p->size), cache(nullptr), blkSize(0),
+      latency(p->latency), degree(p->degree),
       useMasterId(p->use_master_id), pageStop(!p->cross_pages),
       serialSquash(p->serial_squash), onlyData(p->data_accesses_only),
       onMissOnly(p->on_miss_only), onReadOnly(p->on_read_only),
@@ -69,6 +70,7 @@ BasePrefetcher::BasePrefetcher(const Params *p)
 void
 BasePrefetcher::setCache(BaseCache *_cache)
 {
+    assert(!cache);
     cache = _cache;
     blkSize = cache->getBlockSize();
 }
diff --git a/src/mem/cache/prefetch/base.hh b/src/mem/cache/prefetch/base.hh
index fc0dd0b36..22a4c68f6 100644
--- a/src/mem/cache/prefetch/base.hh
+++ b/src/mem/cache/prefetch/base.hh
@@ -83,7 +83,7 @@ class BasePrefetcher : public ClockedObject
     BaseCache* cache;
 
     /** The block size of the parent cache. */
-    int blkSize;
+    unsigned blkSize;
 
     /** The latency before a prefetch is issued */
     const Cycles latency;