what happened if kernel version is different from module build

what happened if kernel version is different from module build

[wuzhouhui]

Suppose I compile a kernel module in kernel 2.6.32-431.el6.x86_64, but I load it
successfully in kernel 2.6.32-432.el6.x86_64. Can this module works properly? Or
whether it is harm to system?

Thanks!
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Re: what happened if kernel version is different from module build

[Hubert Chaumette]

Le 15/10/2017 16:00, wuzhouhui a écrit :

> Suppose I compile a kernel module in kernel 2.6.32-431.el6.x86_64, but 
> I load it
> successfully in kernel 2.6.32-432.el6.x86_64. Can this module works 
> properly? Or
> whether it is harm to system?

In your case both kernels are 2.6.32, I there is probably only bugfixes 
between
these two kernels (the core kernel code shouldn't have changed), so I 
think it
*can* work properly, provided your module didn't rely on a bug fixed in 
the new
kernel.

Regards,

Hubert Chaumette
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Re: what happened if kernel version is different from module build

[wuzhouhui]

On 10/15/2017 11:25 PM, Rohith Seelaboyina wrote:
> It can't be installed due to version mismatch
In fact, I did load it successfully in different kernel. What I worried 
is that the
Module.symvers and System.map of these two kernel are different, and module
building needs them. I only fix some bugs of schedule code:

diff -uprN linux-2.6.32-431.el6.6.vsds.x86_64.orig/ 
linux-2.6.32-431.el6.6.vsds.x86_64/|diffstat  -p0
  linux-2.6.32-431.el6.6.vsds.x86_64/kernel/sched.c      |   26 ++---
  linux-2.6.32-431.el6.6.vsds.x86_64/kernel/sched_fair.c |   76 
++++++++++++-----
  2 files changed, 69 insertions(+), 33 deletions(-)
>
> On Oct 15, 2017 7:39 PM, "wuzhouhui" <wuzhouhui14@mails.ucas.ac.cn 
> <mailto:wuzhouhui14@mails.ucas.ac.cn>> wrote:
>
>     Suppose I compile a kernel module in kernel 2.6.32-431.el6.x86_64,
>     but I load it
>     successfully in kernel 2.6.32-432.el6.x86_64. Can this module
>     works properly? Or
>     whether it is harm to system?
>
>     Thanks!
>     --
>     To unsubscribe from this list: send the line "unsubscribe
>     linux-newbie" in
>     the body of a message to majordomo@vger.kernel.org
>     <mailto:majordomo@vger.kernel.org>
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>

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