Header cleanup patches for 2023-02-06

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Merge tag 'pull-include-2023-02-06-v2' of https://repo.or.cz/qemu/armbru into staging

Header cleanup patches for 2023-02-06

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# gpg: Signature made Wed 08 Feb 2023 06:28:37 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-include-2023-02-06-v2' of https://repo.or.cz/qemu/armbru:
  Drop duplicate #include
  Don't include headers already included by qemu/osdep.h
  Fix non-first inclusions of qemu/osdep.h
  accel: Clean up includes
  block: Clean up includes
  riscv: Clean up includes
  target/hexagon: Clean up includes
  net: Clean up includes
  migration: Clean up includes
  qga: Clean up includes
  hw/tricore: Clean up includes
  hw/input: Clean up includes
  hw/cxl: Clean up includes
  crypto: Clean up includes
  bsd-user: Clean up includes
  scripts/clean-includes: Improve --git commit message
  scripts/clean-includes: Skip symbolic links
  scripts/clean-includes: Don't claim duplicate headers found when not
  scripts/clean-includes: Fully skip / ignore files

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

scripts/clean-includes

@@ -111,7 +111,12 @@ cat >"$COCCIFILE" <<EOT
 )
 EOT
 
+files=
 for f in "$@"; do
+  if [ -L "$f" ]; then
+      echo "SKIPPING $f (symbolic link)"
+      continue
+  fi
   case "$f" in
     *.c.inc)
       # These aren't standalone C source files
@@ -144,6 +149,7 @@ for f in "$@"; do
       continue
       ;;
   esac
+  files="$files $f"
 
   if [ "$MODE" = "c" ]; then
     # First, use Coccinelle to add qemu/osdep.h before the first existing include
@@ -174,25 +180,30 @@ for f in "$@"; do
 
 done
 
-if [ "$DUPHEAD" = "yes" ]; then
-    egrep "^[[:space:]]*#[[:space:]]*include" "$@" | tr -d '[:blank:]' \
-        | sort | uniq -c | awk '{if ($1 > 1) print $0}'
-    if [ $? -eq 0 ]; then
+if [ "$DUPHEAD" = "yes" ] && [ -n "$files" ]; then
+    if egrep "^[[:space:]]*#[[:space:]]*include" $files | tr -d '[:blank:]' \
+        | sort | uniq -c | grep -v '^ *1 '; then
         echo "Found duplicate header file includes. Please check the above files manually."
         exit 1
     fi
 fi
 
 if [ "$GIT" = "yes" ]; then
-    git add -- "$@"
+    git add -- $files
     git commit --signoff -F - <<EOF
 $GITSUBJ: Clean up includes
 
-Clean up includes so that osdep.h is included first and headers
-which it implies are not included manually.
-
 This commit was created with scripts/clean-includes.
 
+All .c should include qemu/osdep.h first.  The script performs three
+related cleanups:
+
+* Ensure .c files include qemu/osdep.h first.
+* Including it in a .h is redundant, since the .c  already includes
+  it.  Drop such inclusions.
+* Likewise, including headers qemu/osdep.h includes is redundant.
+  Drop these, too.
+
 EOF
 
 fi