update-linux-headers: copy standard-headers files one by one

cp_virtio is called for both the asm-s390/ and linux/ directories,
so it looks for pci_regs.h and input.h files in asm-s390/ too.  This
makes little sense.  In the next patch we will have the opposite
problem; we want to add asm-x86/hyperv.h, and there's also a
linux/hyperv.h file with unwanted dependencies on additional Linux
uapi headers.  We do not want to copy linux/hyperv.h.

The solution is to make cp_virtio (now renamed to cp_portable) copy
one file only, instead of using the "find" command, and call it multiple
times.  The new function is really just a reindentation of the old one.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/update-linux-headers.sh

@@ -28,39 +28,32 @@ if [ -z "$output" ]; then
     output="$PWD"
 fi
 
-cp_virtio() {
-    from=$1
+cp_portable() {
+    f=$1
     to=$2
-    virtio=$(find "$from" -name '*virtio*h' -o -name "input.h" -o -name "pci_regs.h")
-    if [ "$virtio" ]; then
-        rm -rf "$to"
-        mkdir -p "$to"
-        for f in $virtio; do
-            if
-                grep '#include' "$f" | grep -v -e 'linux/virtio' \
-                                             -e 'linux/types' \
-                                             -e 'stdint' \
-                                             -e 'linux/if_ether' \
-                                             -e 'sys/' \
-                                             > /dev/null
-            then
-                echo "Unexpected #include in input file $f".
-                exit 2
-            fi
-
-            header=$(basename "$f");
-            sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
-                -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
-                -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
-                -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
-                -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
-                -e 's/__bitwise__//' \
-                -e 's/__attribute__((packed))/QEMU_PACKED/' \
-                -e 's/__inline__/inline/' \
-                -e '/sys\/ioctl.h/d' \
-                "$f" > "$to/$header";
-        done
+    if
+        grep '#include' "$f" | grep -v -e 'linux/virtio' \
+                                     -e 'linux/types' \
+                                     -e 'stdint' \
+                                     -e 'linux/if_ether' \
+                                     -e 'sys/' \
+                                     > /dev/null
+    then
+        echo "Unexpected #include in input file $f".
+        exit 2
     fi
+
+    header=$(basename "$f");
+    sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
+        -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
+        -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
+        -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
+        -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
+        -e 's/__bitwise__//' \
+        -e 's/__attribute__((packed))/QEMU_PACKED/' \
+        -e 's/__inline__/inline/' \
+        -e '/sys\/ioctl.h/d' \
+        "$f" > "$to/$header";
 }
 
 # This will pick up non-directories too (eg "Kconfig") but we will
@@ -93,7 +86,12 @@ for arch in $ARCHLIST; do
         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
     fi
 
-    cp_virtio "$tmpdir/include/asm" "$output/include/standard-headers/asm-$arch"
+    rm -rf "$output/include/standard-headers/asm-$arch"
+    mkdir -p "$output/include/standard-headers/asm-$arch"
+    if [ $arch = s390 ]; then
+        cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
+        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
+    fi
 done
 
 rm -rf "$output/linux-headers/linux"
@@ -120,7 +118,12 @@ cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 #include "standard-headers/linux/virtio_ring.h"
 EOF
 
-cp_virtio "$tmpdir/include/linux/" "$output/include/standard-headers/linux"
+rm -rf "$output/include/standard-headers/linux"
+mkdir -p "$output/include/standard-headers/linux"
+for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
+         "$tmpdir/include/linux/pci_regs.h"; do
+    cp_portable "$i" "$output/include/standard-headers/linux"
+done
 
 cat <<EOF >$output/include/standard-headers/linux/types.h
 #include <stdint.h>