[PATCH] kbuild: Fix cleanpatch to always replace leading space with tab

[Andi Kleen <andi@firstfloor.org>]

From: Andi Kleen <ak@linux.intel.com>

If you have something like

<sp><sp><sp><sp><sp><sp><sp><sp>blabla

in a patch cleanpatch does not replace the spaces with tabs.
That is because it only handles space in front of tab.

But it's more convenient if it also replaces space with tabs,
even if there is no tab at all, as that is what checkpatch
and other pedants expect.

Cc: hpa@zytor.com
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 scripts/cleanpatch | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/cleanpatch b/scripts/cleanpatch
index 9680d03..d14aac9 100755
--- a/scripts/cleanpatch
+++ b/scripts/cleanpatch
@@ -39,6 +39,10 @@ sub clean_space_tabs($)
 	} elsif ($c eq " ") {
 	    $nsp++;
 	} else {
+	    while ($nsp >= 8) {
+	        $lo .= "\t";
+		$nsp -= 8;
+	    }
 	    $lo .= " " x $nsp;
 	    $pos += $nsp;
 	    $nsp = 0;
-- 
1.9.3