On Fri, Dec 07, 2007 at 09:04:30PM +0900, Tejun Heo wrote:
> When multiple built-in modules (especially drivers) provide the same
> capability, they're prioritized by link order specified by the order
> listed in Makefile. This implicit ordering is lost for loadable
> modules.
>
> When driver modules are loaded by udev, what comes first in
> modules.alias file is selected. However, the order in this file is
> indeterministic (depends on filesystem listing order of installed
> modules). This causes confusion.
>
> The solution is two-parted. This patch updates kbuild such that it
> generates and installs modules.order which contains the name of
> modules ordered according to Makefile. The second part is update to
> depmod such that it generates output files according to this file.
>
> Note that both obj-y and obj-m subdirs can contain modules and
> ordering information between those two are lost from beginning.
> Currently obj-y subdirs are put before obj-m subdirs.
>
> Sam Ravnborg cleaned up Makefile modifications and suggested using awk
> to remove duplicate lines from modules.order instead of using separate
> C program.
>
> Signed-off-by: Tejun Heo <[email protected]>
> Cc: Sam Ravnborg <[email protected]>
> Cc: Bill Nottingham <[email protected]>
> Cc: Rusty Russell <[email protected]>
> Cc: Greg Kroah-Hartman <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
thanks for doing this, looks very nice.
greg k-h
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