tags: Add the ability to make tags for all archs using "all"

make ALLSOURCE_ARCHS=all tags
- Document this in kbuild.txt
Without this change you have to type each arch separately.

Signed-off-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

2 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 84725b72675a..634c625da8ce 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -162,3 +162,7 @@ For tags/TAGS/cscope targets, you can specify more than one arch
 to be included in the databases, separated by blank space. E.g.:
 
     $ make ALLSOURCE_ARCHS="x86 mips arm" tags
+
+To get all available archs you can also specify all. E.g.:
+
+    $ make ALLSOURCE_ARCHS=all tags
diff --git a/scripts/tags.sh b/scripts/tags.sh
index caa867dba16d..868b4c8fc25f 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -24,9 +24,20 @@ else
         tree=${srctree}/
 fi
 
+# Find all available archs
+find_all_archs()
+{
+        ALLSOURCE_ARCHS=""
+        for arch in `ls ${tree}arch`; do
+                ALLSOURCE_ARCHS="${ALLSOURCE_ARCHS} "${arch##\/}
+        done
+}
+
 # Detect if ALLSOURCE_ARCHS is set. If not, we assume SRCARCH
 if [ "${ALLSOURCE_ARCHS}" = "" ]; then
         ALLSOURCE_ARCHS=${SRCARCH}
+elif [ "${ALLSOURCE_ARCHS}" = "all" ]; then
+        find_all_archs
 fi
 
 # find sources in arch/$ARCH