From 482a6d4aea0a2e76853b133f3ce40e960a3cd80e Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 15 Sep 2012 12:16:11 +0000
Subject: [PATCH] kernel: suppress redundant calls to headers installation

SVN-Revision: 33421
---
 include/kernel-defaults.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index 1cb8b445e9..8075079d70 100644
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -106,7 +106,7 @@ define Kernel/Configure/Default
 	$(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
 	$(call Kernel/SetInitramfs)
 	rm -rf $(KERNEL_BUILD_DIR)/modules
-	$(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
+	[ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 	$(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 endef
 
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