[PATCH] kbuild: Add KDEB_COMPRESS_LEVEL to control compression level

[Matt Fleming]

From: Matt Fleming <mfleming@xxxxxxxxxxxxxx>

Give users more control to tradeoff compression time vs compressed size
when building debian packages with a new KDEB_COMPRESS_LEVEL option.

Here are some examples of using KDEB_COMPRESS=xz with
KDEB_COMPRESS_LEVEL=1 through to KDEB_COMPRESS_LEVEL=6 with the
bindeb-pkg target:

  Level Time to compress Compressed size (bytes)
  ----- ---------------- -----------------------
      1        0m36.771s               476909176
      2        0m40.335s               474832644
      3        0m43.635s               473845600
      4        1m13.839s               472260012
      5        1m18.657s               464442676
      6        1m20.658s               464355000

Signed-off-by: Matt Fleming <mfleming@xxxxxxxxxxxxxx>
---
 scripts/package/debian/rules | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/package/debian/rules b/scripts/package/debian/rules
index ca07243bd5cd..616ecf1d4d1b 100755
--- a/scripts/package/debian/rules
+++ b/scripts/package/debian/rules
@@ -52,7 +52,7 @@ define binary
 	$(Q)dh_fixperms $(DH_OPTIONS)
 	$(Q)dh_gencontrol $(DH_OPTIONS) -- -f$(call mk-files,$@)
 	$(Q)dh_md5sums $(DH_OPTIONS)
-	$(Q)dh_builddeb $(DH_OPTIONS) -- $(addprefix -Z,$(KDEB_COMPRESS))
+	$(Q)dh_builddeb $(DH_OPTIONS) -- $(addprefix -Z,$(KDEB_COMPRESS)) $(addprefix -z,$(KDEB_COMPRESS_LEVEL))
 endef
 
 .PHONY: $(binary-targets)
-- 
2.34.1