diff --git a/src/archwriter.c b/src/archwriter.c
index b9a8d55..399c0f5 100644
--- a/src/archwriter.c
+++ b/src/archwriter.c
@@ -189,12 +189,12 @@ int archwriter_write_buffer(carchwriter *ai, struct s_writebuf *wb)
     
     assert(ai);
     assert(wb);
-    
-    if (wb->size <=0)
+
+    if (wb->size == 0)
     {   errprintf("wb->size=%ld\n", (long)wb->size);
         return -1;
     }
-    
+
     if ((lres=write(ai->archfd, (char*)wb->data, (long)wb->size))!=(long)wb->size)
     {
         errprintf("write(size=%ld) returned %ld\n", (long)wb->size, (long)lres);
diff --git a/src/common.c b/src/common.c
index 9efa4e4..eef45c6 100644
--- a/src/common.c
+++ b/src/common.c
@@ -397,9 +397,9 @@ int exec_command(char *command, int cmdbufsize, int *exitst, char *stdoutbuf, in
         
         // read the remaining data in the pipes 
         if ((stdoutbuf!=NULL) && (outpos+1 < stdoutsize))
-            res=read(mystdout, stdoutbuf+outpos, stdoutsize-outpos-1);
+            read(mystdout, stdoutbuf+outpos, stdoutsize-outpos-1);
         if ((stderrbuf!=NULL) && (errpos+1 < stderrsize))
-            res=read(mystderr, stderrbuf+errpos, stderrsize-errpos-1);
+            read(mystderr, stderrbuf+errpos, stderrsize-errpos-1);
         
         msgprintf(MSG_VERB1, "command [%s] returned %d\n", command, WEXITSTATUS(status));
         if (exitst)
@@ -616,4 +616,3 @@ int get_path_to_volume(char *newvolbuf, int bufsize, char *basepath, long curvol
     
     return 0;
 }
-
diff --git a/src/fs_reiser4.c b/src/fs_reiser4.c
index 42993d5..8c1cb61 100644
--- a/src/fs_reiser4.c
+++ b/src/fs_reiser4.c
@@ -126,8 +126,8 @@ int reiser4_getinfo(cdico *d, char *devname)
     temp16=le16_to_cpu(sb.blocksize);
     if (temp16!=4096)
     {   ret=-5;
-        goto reiser4_get_specific_close;
         errprintf("invalid reiser4 block-size: %ld, it should be 4096\n", (long)temp16);
+        goto reiser4_get_specific_close;
     }
     else
     {   dico_add_u64(d, 0, FSYSHEADKEY_FSREISER4BLOCKSIZE, temp16);
diff --git a/src/fsarchiver.c b/src/fsarchiver.c
index 7c414f1..3f3b018 100644
--- a/src/fsarchiver.c
+++ b/src/fsarchiver.c
@@ -46,13 +46,17 @@ char *valid_magic[]={FSA_MAGIC_MAIN, FSA_MAGIC_VOLH, FSA_MAGIC_VOLF,
 
 void usage(char *progname, bool examples)
 {
-    int lzo=false, lzma=false;
-    
+    int lzo, lzma;
+
 #ifdef OPTION_LZO_SUPPORT
     lzo=true;
+#else
+    lzo=false;
 #endif // OPTION_LZO_SUPPORT
 #ifdef OPTION_LZMA_SUPPORT
     lzma=true;
+#else
+    lzma=false;
 #endif // OPTION_LZMA_SUPPORT
     
     msgprintf(MSG_FORCE, "====> fsarchiver version %s (%s) - http://www.fsarchiver.org <====\n", FSA_VERSION, FSA_RELDATE);
diff --git a/src/oper_restore.c b/src/oper_restore.c
index 0c8fe3a..ef0a959 100644
--- a/src/oper_restore.c
+++ b/src/oper_restore.c
@@ -168,7 +168,7 @@ int convert_argv_to_strdicos(cstrdico *dicoargv[], int argc, char *cmdargv[])
 int extractar_listing_print_file(cextractar *exar, int objtype, char *relpath)
 {
     char strprogress[256];
-    u64 progress;
+    s64 progress;
     
     memset(strprogress, 0, sizeof(strprogress));
     if (exar->cost_global>0)
diff --git a/src/oper_save.c b/src/oper_save.c
index 7d1838e..bc716cb 100644
--- a/src/oper_save.c
+++ b/src/oper_save.c
@@ -279,7 +279,7 @@ int createar_item_xattr(csavear *save, char *root, char *relpath, struct stat64
         len=strlen(buffer+pos)+1;
         attrsize=lgetxattr(fullpath, buffer+pos, NULL, 0);
         msgprintf(MSG_VERB2, "            xattr:file=[%s], attrid=%d, name=[%s], size=%ld\n", relpath, (int)attrcnt, buffer+pos, (long)attrsize);
-        if ((attrsize>0) && (attrsize>65535LL))
+        if (attrsize>65535LL)
         {   errprintf("file [%s] has an xattr [%s] with data too big (size=%ld, maxsize=64k)\n", relpath, buffer+pos, (long)attrsize);
             ret=-1;
             continue; // copy the next xattr
@@ -311,7 +311,7 @@ int createar_item_xattr(csavear *save, char *root, char *relpath, struct stat64
             free(valbuf);
             continue; // copy the next xattr
         }
-        else if (errno==ENOATTR) // if the attribute does not exist
+        else // errno==ENOATTR hence the attribute does not exist
         {
             msgprintf(MSG_VERB2, "            xattr:lgetxattr-win(%s,%s)=-1: errno==ENOATTR\n", relpath, buffer+pos);
             free(valbuf);
@@ -353,7 +353,7 @@ int createar_item_winattr(csavear *save, char *root, char *relpath, struct stat6
             continue; // ignore the current xattr
         }
         msgprintf(MSG_VERB2, "            winattr:file=[%s], attrcnt=%d, name=[%s], size=%ld\n", relpath, (int)attrcnt, winattr[i], (long)attrsize);
-        if ((attrsize>0) && (attrsize>65535LL))
+        if (attrsize>65535LL)
         {
             errprintf("file [%s] has an xattr [%s] with data size=%ld too big (max xattr size is 65535)\n", relpath, winattr[i], (long)attrsize);
             ret=-1;
@@ -384,15 +384,11 @@ int createar_item_winattr(csavear *save, char *root, char *relpath, struct stat6
             free(valbuf);
             continue; // ignore the current xattr
         }
-        else if (errno==ENOATTR) // if the attribute does not exist
+        else // errno==ENOATTR hence the attribute does not exist
         {
             msgprintf(MSG_VERB2, "            winattr:lgetxattr-win(%s,%s)=-1: errno==ENOATTR\n", relpath, winattr[i]);
             free(valbuf);
         }
-        else
-        {
-            free(valbuf);
-        }
     }
     
     return ret;
@@ -581,7 +577,7 @@ int createar_save_file(csavear *save, char *root, char *relpath, struct stat64 *
     cdico *dicoattr;
     int attrerrors=0;
     u64 filecost;
-    u64 progress;
+    s64 progress;
     int objtype;
     int res;
     
diff --git a/src/queue.c b/src/queue.c
index 6b2d9b8..a1bca70 100644
--- a/src/queue.c
+++ b/src/queue.c
@@ -509,8 +509,8 @@ s64 queue_dequeue_block(cqueue *q, cblockinfo *blkinfo)
         return FSAERR_ENDOFFILE;
     }
     
-    // should not happen since queuelocked_is_first_block_ready means there is at least one block in the queue
-    assert((cur=q->head)!=NULL);
+    cur=q->head;
+    assert(cur!=NULL); // queuelocked_is_first_block_ready means there is at least one block in the queue
     
     // test the first item
     if ((cur->type==QITEM_TYPE_BLOCK) && (cur->status==QITEM_STATUS_DONE))
@@ -581,8 +581,8 @@ s64 queue_dequeue_header_internal(cqueue *q, cheadinfo *headinfo)
         return FSAERR_ENDOFFILE;
     }
     
-    // should not happen since queuelocked_is_first_block_ready means there is at least one block in the queue
-    assert ((cur=q->head)!=NULL);
+    cur=q->head;
+    assert (cur!=NULL); // queuelocked_is_first_block_ready means there is at least one block in the queue
     
     // test the first item
     switch (cur->type)
@@ -712,8 +712,8 @@ s64 queue_destroy_first_item(cqueue *q)
         return FSAERR_ENDOFFILE;
     }
     
-    // should not happen since queuelocked_is_first_block_ready means there is at least one block in the queue
-    assert((cur=q->head)!=NULL);
+    cur=q->head;
+    assert(cur!=NULL); // queuelocked_is_first_block_ready means there is at least one block in the queue
     
     switch (cur->type)
     {
diff --git a/src/thread_comp.c b/src/thread_comp.c
index 8827d0f..4b6bf15 100644
--- a/src/thread_comp.c
+++ b/src/thread_comp.c
@@ -127,7 +127,7 @@ int compress_block_generic(struct s_blockinfo *blkinfo)
         }
         if ((res=crypto_blowfish(blkinfo->blkcompsize, &cryptsize, (u8*)bufcomp, (u8*)bufcrypt, 
             g_options.encryptpass, strlen((char*)g_options.encryptpass), 1))!=0)
-        {   errprintf("crypt_block_blowfish() failed\n");
+        {   errprintf("crypt_block_blowfish() failed with res=%d\n", res);
             return -1;
         }
         free(bufcomp);