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image: pass device blocksize to padjffs2

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At the moment the padding steps are hardcoded. Especially images for
devices with a 4K sector size can be unnecessarily bloated using the
hardcoded padding steps.

It has been observed that 192Kb of padding was added to the image of a
4MB device, albeit due to the 4K sector size the minimum required extra
padding for the jffs2 rootfs_data is 20Kb.

In worst case it means that the image-size check could fail albeit
there is enough space for all selected packages

For device build code not exposing the blocksize, use the hardcoded
padding further on.

Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Mathias Kresin 2016-09-03 07:40:15 +02:00
parent 85fefcdb61
commit ddd259b0d5
1 changed files with 2 additions and 1 deletions
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3
include/image-commands.mk
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@ -131,7 +131,8 @@ define Build/pad-to
endef
define Build/pad-rootfs
$(STAGING_DIR_HOST)/bin/padjffs2 $@ $(1) 4 8 16 64 128 256
$(STAGING_DIR_HOST)/bin/padjffs2 $@ $(1) \
$(if $(BLOCKSIZE),$(BLOCKSIZE:%k=%),4 8 16 64 128 256)
endef
define Build/pad-offset