Refinements / bug fixes of the changes introduced in the previous commit:

- Only replace sBUG/sBUG_ON by BUG/BUG_ON when this macro is being used, not
  in its definition.
- Fixed bugs in algorithm for preserving the original code during a sparse run.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1076 d57e44dd-8a1f-0410-8b47-8ef2f437770f

scripts/generate-kernel-patch

@@ -69,11 +69,19 @@ diff -uprN orig/linux-${kernel_version}/$2 linux-${kernel_version}/$2
 +++ linux-${kernel_version}/$2
 @@ -0,0 +1,$(wc -l "$1" | { read a b; echo $a; }) @@
 EOF
-    if [ "${2%.[ch]}" != "$2" ]; then
-      sed -e 's/sBUG(/BUG(/g' -e 's/sBUG_ON(/BUG_ON(/g' -e 's/^/+/' \
-          -e 's/^ \([^ ]*:\)$/\1/' < "$1"
+    # Insert a '+'-sign at the start of each line.
+    sed -e 's/^/+/' < "$1" | \
+    if [ "${replace_sbug_by_bug}" = "true" ]; then
+      sed -e 's/sBUG(\([^)]\)/BUG(\1/g' -e 's/sBUG_ON(\([^)]\)/BUG_ON(\1/g'
     else
-      sed -e 's/sBUG(/BUG(/g' -e 's/sBUG_ON(/BUG_ON(/g' -e 's/^/+/' < "$1"
+      cat
+    fi \
+    |  \
+    if [ "${2%.[ch]}" != "$2" ]; then
+      # Make sure that labels (goto-targets) are left-aligned.
+      sed -e 's/^ \([^ ]*:\)$/\1/'
+    else
+      cat
     fi
   fi
 }
@@ -138,6 +146,7 @@ mpt_scst="false"
 multiple_patches="false"
 patchdir=""
 specialize_patch_options="-v delete_disabled_code=1"
+replace_sbug_by_bug="true"
 
 if [ ! -e scst -o ! -e iscsi-scst -o ! -e srpt -o ! -e scst_local ]; then
   echo "Please run this script from inside the SCST subversion source tree."
@@ -151,7 +160,10 @@ do
     '-h') usage; exit 1;;
     '-l') shift;;
     '-m') mpt_scst="true"; shift;;
-    '-n') specialize_patch_options="-v delete_disabled_code=0"; shift;;
+    '-n') specialize_patch_options="-v delete_disabled_code=0"
+          replace_sbug_by_bug="false"
+          shift
+          ;;
     '-p') multiple_patches="true"; patchdir="$2"; shift; shift;;
     '-q') qla2x00t="true"; shift;;
     '--') shift;;

scripts/specialize-patch

@@ -224,6 +224,7 @@ function handle_if()
 
 function process_preprocessor_statement() {
   last_if_nesting_level = if_nesting_level
+  orig_stmnt = $0
   evaluated = evaluate($0)
   condition = 1
   delete_next_blank_line = 0
@@ -263,7 +264,7 @@ function process_preprocessor_statement() {
   }
   if (delete_disabled_code == 0 || (output && (! condition || condition && matching_if !~ "^+#if [01]")))
   {
-    line[lines++]=$0
+    line[lines++] = orig_stmnt
   }
   else if (evaluated ~ "^+#define SCSI_EXEC_REQ_FIFO_DEFINED$" \
            || evaluated ~ "^+#define SCST_IO_CONTEXT$")
@@ -314,6 +315,8 @@ BEGIN {
     printf "Error: kernel version (%s) is out of range.\n", kernel_version
     exit 1
   }
+  if (delete_disabled_code != 0 && delete_disabled_code != 1)
+    delete_disabled_code = 0
 
   # Variable initialization.
   lines = 0
@@ -346,7 +349,7 @@ BEGIN {
     dump_lines()
     match($0, "^@@ -([0-9]*),([0-9]*) \\+([0-9]*),([0-9]*) @@(.*)$", h)
   }
-  else if (delete_disabled_output && delete_next_blank_line && match($0, "^+$"))
+  else if (delete_disabled_code && delete_next_blank_line && match($0, "^+$"))
   {
     lines_deleted++
     delete_next_blank_line = 0
@@ -358,7 +361,7 @@ BEGIN {
     {
       process_preprocessor_statement()
     }
-    else if (delete_disabled_output == 0 || output)
+    else if (delete_disabled_code == 0 || output)
     {
       # Store the line that was just read.
       line[lines++]=$0