2010-08-16 08:07:01

by Jon Masters

[permalink] [raw]
Subject: [PATCH] modules: don't call depmod when overriding external module install path

Recent kernels include an additional call to depmod during the installation
of external kernel modules as a convenience, in order to ensure that those
modules are picked up by the module loading tools/initramfs scripts, etc.
Although this call is potentially of some value, it should not be made
when explicitly setting INSTALL_MOD_PATH to a different location. This
avoids creating extraneous modules.* files that will never be used.

Signed-off-by: Jon Masters <[email protected]>
---
Makefile | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile
index f3bdff8..2b904f2 100644
--- a/Makefile
+++ b/Makefile
@@ -1325,7 +1325,9 @@ _emodinst_:

PHONY += _emodinst_post
_emodinst_post: _emodinst_
+ifeq ($(INSTALL_MOD_PATH),)
$(call cmd,depmod)
+endif

clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

--
1.7.2.1


2010-08-16 10:44:04

by Rusty Russell

[permalink] [raw]
Subject: Re: [PATCH] modules: don't call depmod when overriding external module install path

On Mon, 16 Aug 2010 05:33:34 pm Jon Masters wrote:
> Recent kernels include an additional call to depmod during the installation
> of external kernel modules as a convenience, in order to ensure that those
> modules are picked up by the module loading tools/initramfs scripts, etc.
> Although this call is potentially of some value, it should not be made
> when explicitly setting INSTALL_MOD_PATH to a different location. This
> avoids creating extraneous modules.* files that will never be used.
>
> Signed-off-by: Jon Masters <[email protected]>

Acked-by: Rusty Russell <[email protected]>

I leave the Makefile stuff to the kbuild people...

> ---
> Makefile | 2 ++
> 1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index f3bdff8..2b904f2 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1325,7 +1325,9 @@ _emodinst_:
>
> PHONY += _emodinst_post
> _emodinst_post: _emodinst_
> +ifeq ($(INSTALL_MOD_PATH),)
> $(call cmd,depmod)
> +endif
>
> clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

Thanks,
Rusty.

2010-08-16 22:29:27

by Jon Masters

[permalink] [raw]
Subject: Re: [PATCH] modules: don't call depmod when overriding external module install path

On Mon, 2010-08-16 at 20:13 +0930, Rusty Russell wrote:
> On Mon, 16 Aug 2010 05:33:34 pm Jon Masters wrote:
> > Recent kernels include an additional call to depmod during the installation
> > of external kernel modules as a convenience, in order to ensure that those
> > modules are picked up by the module loading tools/initramfs scripts, etc.
> > Although this call is potentially of some value, it should not be made
> > when explicitly setting INSTALL_MOD_PATH to a different location. This
> > avoids creating extraneous modules.* files that will never be used.
> >
> > Signed-off-by: Jon Masters <[email protected]>
>
> Acked-by: Rusty Russell <[email protected]>
>
> I leave the Makefile stuff to the kbuild people...

Hey, thanks for forwarding. I figured I would do that, but I see you
already did. And yea, next time I'll ping the Kbuild folks directly.

Jon.

2010-08-17 02:47:57

by Cong Wang

[permalink] [raw]
Subject: Re: [PATCH] modules: don't call depmod when overriding external module install path

On Mon, Aug 16, 2010 at 08:13:45PM +0930, Rusty Russell wrote:
>On Mon, 16 Aug 2010 05:33:34 pm Jon Masters wrote:
>> Recent kernels include an additional call to depmod during the installation
>> of external kernel modules as a convenience, in order to ensure that those
>> modules are picked up by the module loading tools/initramfs scripts, etc.
>> Although this call is potentially of some value, it should not be made
>> when explicitly setting INSTALL_MOD_PATH to a different location. This
>> avoids creating extraneous modules.* files that will never be used.
>>
>> Signed-off-by: Jon Masters <[email protected]>
>
>Acked-by: Rusty Russell <[email protected]>
>
>I leave the Makefile stuff to the kbuild people...
>

Looks good for me,

Acked-by: WANG Cong <[email protected]>