From: Otavio Salvador <otavio@ossystems.com.br>
Date: Mon, 30 Apr 2012 21:01:54 +0000 (-0300)
Subject: image_types_fsl.bbclass: use a sparse file for sdcard generation
X-Git-Tag: 2.1~1850
X-Git-Url: https://code.ossystems.io/gitweb?a=commitdiff_plain;h=2ee18cb8676cc0f915823d5be20784ba64646388;p=meta-freescale.git

image_types_fsl.bbclass: use a sparse file for sdcard generation

This speeds up the generation of the sdcard and reduces the amount of
space used for it.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Reported-by: "John Passaniti" <jpassaniti@ashly.com>
---

diff --git a/meta-fsl-arm/classes/image_types_fsl.bbclass b/meta-fsl-arm/classes/image_types_fsl.bbclass
index d9e292c6..5d213e51 100644
--- a/meta-fsl-arm/classes/image_types_fsl.bbclass
+++ b/meta-fsl-arm/classes/image_types_fsl.bbclass
@@ -53,7 +53,8 @@ IMAGE_CMD_sdcard () {
 	TMP=${WORKDIR}/tmp
 	SDCARD=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.sdcard
 
-	dd if=/dev/zero of=${SDCARD} bs=$(expr 1000 \* 1000) count=${SDCARD_SIZE}
+	# Initialize a sparse file
+	dd if=/dev/zero of=${SDCARD} bs=1 count=0 seek=$(expr 1000 \* 1000 \* ${SDCARD_SIZE})
 
 	# Create partition table
 	parted -s ${SDCARD} mklabel msdos