How to choice the Open source project about kernel?
hi: How to choice the Open source project about kernel? I'm a new one, and I want to practice the technology about kernel. Please list some simple projects, thank you ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
misc device question
Hello,kernelnewbies
I am trying to develop a misc driver in 3.7.0 kernel.
As a basis I copy and paste this code, *without any change*,
http://virtlog.com/2008/03/25/linux-miscdevice-sample/
And build it.
after insmod I have :
[root@n miscDevice]\ls -al /dev/mymisc
crw--- 1 root root 10, 59 Dec 19 10:24 /dev/mymisc
However, when trying to open this file I get:
open: No such file or directory
Any ideas why ?
The program with which I try to open the device is simple, a few lines
following here:
int main()
{
int fd;
fd = open(/dev/mymodule, O_RDONLY);
if (fd == -1) {
perror(open);
exit(1);
}
printf(open succeeded\n);
}
Any ideas why this error ?
rgs,
Kevin
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: misc device question
On Wed, Dec 19, 2012 at 10:36 AM, Kevin Wilson wkev...@gmail.com wrote:
Hello,kernelnewbies
I am trying to develop a misc driver in 3.7.0 kernel.
As a basis I copy and paste this code, *without any change*,
http://virtlog.com/2008/03/25/linux-miscdevice-sample/
And build it.
after insmod I have :
[root@n miscDevice]\ls -al /dev/mymisc
crw--- 1 root root 10, 59 Dec 19 10:24 /dev/mymisc
However, when trying to open this file I get:
open: No such file or directory
Any ideas why ?
You should implement open. Check this out [1]
The program with which I try to open the device is simple, a few lines
following here:
int main()
{
int fd;
fd = open(/dev/mymodule, O_RDONLY);
Isn't this supposed to be called /dev/mymisc ?
if (fd == -1) {
perror(open);
exit(1);
}
printf(open succeeded\n);
}
thanks,
Daniel.
[1] http://lxr.linux.no/#linux+v3.7.1/drivers/char/efirtc.c#L282
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Question regarding patches
Sorry if this is not relevant to kernel. But since I am patching the kernel - Please consider this as a uber beginner question to ask on this mailing list - forgive me for that. Now my question is - What @@ -321,7 +321,8 @@ mean in this snippet from the patch - diff --git a/exec.h b/exec.h index 722c620..6abb687 100644 --- a/exec.h +++ b/exec.h @@ -321,7 +321,8 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages); -- Shraddha ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: misc device question
Hi,
Thanks.
Isn't this supposed to be called /dev/mymisc ?
Well, your are right ! and with /dev/mymisc it worked!
sorry for the noise.
BTW, it worked also without implementing the open() method
rgs
K.
On Wed, Dec 19, 2012 at 10:51 AM, Daniel Baluta daniel.bal...@gmail.com wrote:
On Wed, Dec 19, 2012 at 10:36 AM, Kevin Wilson wkev...@gmail.com wrote:
Hello,kernelnewbies
I am trying to develop a misc driver in 3.7.0 kernel.
As a basis I copy and paste this code, *without any change*,
http://virtlog.com/2008/03/25/linux-miscdevice-sample/
And build it.
after insmod I have :
[root@n miscDevice]\ls -al /dev/mymisc
crw--- 1 root root 10, 59 Dec 19 10:24 /dev/mymisc
However, when trying to open this file I get:
open: No such file or directory
Any ideas why ?
You should implement open. Check this out [1]
The program with which I try to open the device is simple, a few lines
following here:
int main()
{
int fd;
fd = open(/dev/mymodule, O_RDONLY);
Isn't this supposed to be called /dev/mymisc ?
if (fd == -1) {
perror(open);
exit(1);
}
printf(open succeeded\n);
}
thanks,
Daniel.
[1] http://lxr.linux.no/#linux+v3.7.1/drivers/char/efirtc.c#L282
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Question regarding patches
I think those are git commit IDs. -Avinash On Wed, Dec 19, 2012 at 3:43 PM, Shraddha Kamat sh200...@gmail.com wrote: On Wed, 2012-12-19 at 13:58 +0400, Lijo Antony wrote: On 12/19/2012 12:47 PM, Shraddha Kamat wrote: Sorry if this is not relevant to kernel. But since I am patching the kernel - Please consider this as a uber beginner question to ask on this mailing list - forgive me for that. Now my question is - What @@ -321,7 +321,8 @@ mean in this snippet from the patch - diff --git a/exec.h b/exec.h index 722c620..6abb687 100644 --- a/exec.h +++ b/exec.h @@ -321,7 +321,8 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages); http://www.gnu.org/software/diffutils/manual/html_node/Detailed-Unified.html http://www.artima.com/weblogs/viewpost.jsp?thread=164293 -lijo But I don't see any mention of the index field here // see line index 722c620..6abb687 100644. What does this mean ? -- Shraddha ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- Shraddha ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Question regarding patches
On Wed, 19 Dec 2012, Shraddha Kamat wrote: On Wed, 2012-12-19 at 13:58 +0400, Lijo Antony wrote: On 12/19/2012 12:47 PM, Shraddha Kamat wrote: Sorry if this is not relevant to kernel. But since I am patching the kernel - Please consider this as a uber beginner question to ask on this mailing list - forgive me for that. Now my question is - What @@ -321,7 +321,8 @@ mean in this snippet from the patch - diff --git a/exec.h b/exec.h index 722c620..6abb687 100644 --- a/exec.h +++ b/exec.h @@ -321,7 +321,8 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages); http://www.gnu.org/software/diffutils/manual/html_node/Detailed-Unified.html http://www.artima.com/weblogs/viewpost.jsp?thread=164293 -lijo But I don't see any mention of the index field here // see line index 722c620..6abb687 100644. What does this mean ? See man git-diff (GENERATING PATCHES WITH -P) for the information. Regards, Tobi ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
gcc 2.95.3 compile failure
hi:
I am trying to compile gcc2.95.3 ,after I patch source code , and configure
, make
fail with this :gcc-2.95.3/libio/streambuf.h:37: parse error before `}'
I find this line is 35 extern C {
36 #include libio.h
37 }
how can I fix this error?
thanks！
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: gcc 2.95.3 compile failure
On Wed, Dec 19, 2012 at 2:10 PM, horse_rivers horse_riv...@126.com wrote:
hi:
I am trying to compile gcc2.95.3 ,after I patch source code , and
configure , make
fail with this :gcc-2.95.3/libio/streambuf.h:37: parse error before `}'
I find this line is 35 extern C {
36#include libio.h
37 }
how can I fix this error?
Try this list, you may get a better answer:
http://gcc.gnu.org/ml/gcc-help/
thanks！
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
--
Thank you
Warm Regards
Anuz
___
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: gcc 2.95.3 compile failure
Dear horse_rivers, On Wed, 19 Dec 2012 22:10:07 +0800 (CST), horse_rivers wrote: I am trying to compile gcc2.95.3 ,after I patch source code , and configure , make Do you know we are in 2012 ? Some people are even saying that the end of the world will be in two days. So what do you risk at trying with a sane, recent, version of gcc, instead of the prehistoric 2.95 version? Best regards, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: gcc 2.95.3 compile failure
Le mercredi 19 décembre 2012 à 15:54 +0100, Thomas Petazzoni a écrit : Dear horse_rivers, On Wed, 19 Dec 2012 22:10:07 +0800 (CST), horse_rivers wrote: I am trying to compile gcc2.95.3 ,after I patch source code , and configure , make Do you know we are in 2012 ? Some people are even saying that the end of the world will be in two days. This is already the end of the world: Zombie programs are coming back to live ! Blue screen of the death and such. (hey, just kidding ;) -- Yann Droneaud OPTEYA ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Question regarding patches
On Wed, Dec 19, 2012 at 2:13 AM, Shraddha Kamat sh200...@gmail.com wrote: On Wed, 2012-12-19 at 13:58 +0400, Lijo Antony wrote: On 12/19/2012 12:47 PM, Shraddha Kamat wrote: Sorry if this is not relevant to kernel. But since I am patching the kernel - Please consider this as a uber beginner question to ask on this mailing list - forgive me for that. Now my question is - What @@ -321,7 +321,8 @@ mean in this snippet from the patch - diff --git a/exec.h b/exec.h index 722c620..6abb687 100644 --- a/exec.h +++ b/exec.h @@ -321,7 +321,8 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages); http://www.gnu.org/software/diffutils/manual/html_node/Detailed-Unified.html http://www.artima.com/weblogs/viewpost.jsp?thread=164293 -lijo But I don't see any mention of the index field here // see line index 722c620..6abb687 100644. What does this mean ? '722c620' is the commit id in which a/exec.h is part of and '6abb687' is the commit id in which b/exec.h is part of. 'a' and 'b' are not folders. Its just a notation that diff uses for left and right side. to know more on git look here: http://git-scm.com/book and git diff in particular look at the man page or search for git diff and you get a lot of links that explains it... ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: sysfs: pass function pointers to kernel (not just a value through attribute)
On Mon, Dec 17, 2012 at 10:11:46AM -0500, Terry Hsu wrote: Hello everyone, I am looking for some mechanism for userspace tasks to pass certain functions to kernel and let the kernel execute these functions on behalf of userspace tasks. I know that sysfs can be used with kobject embedded into internal kernel structure to access kernel variables. But is there anyway for userspace tasks to pass a function to kernel to execute through sysfs? PS: adding syscall in the kernel can certainly satisfy my needs but it is less favorable because the new kernel service I want to add is not that general to be added as a new syscall. Thanks in advance! T You might want to use plain old kernel modules, after all. Greetings, Jonathan Neuschäfer ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: How to choice the Open source project about kernel?
On Wed, Dec 19, 2012 at 04:05:57PM +0800, lx wrote: hi: How to choice the Open source project about kernel? I'm a new one, and I want to practice the technology about kernel. Please list some simple projects, thank you Read, understand. Test, find a bug, and try to fix it. There's also several websites (and a few books) that are dedicated to Linux kernel programming out there, such as http://crashcourse.ca/. HTH, Jonathan Neuschäfer ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: How to choice the Open source project about kernel?
2012/12/19 lx lxlenovos...@gmail.com hi: How to choice the Open source project about kernel? I'm a new one, and I want to practice the technology about kernel. Please list some simple projects, thank you Linux Test Project: http://ltp.sourceforge.net/ git repo: git://ltp.git.sourceforge.net/gitroot/ltp/ltp it's appropriate for kernel newbies. Thanks, Zhouping ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re:Re: gcc 2.95.3 compile failure
At 2012-12-19 22:54:30,Thomas Petazzoni thomas.petazz...@free-electrons.com wrote: Dear horse_rivers, On Wed, 19 Dec 2012 22:10:07 +0800 (CST), horse_rivers wrote: I am trying to compile gcc2.95.3 ,after I patch source code , and configure , make Do you know we are in 2012 ? Some people are even saying that the end of the world will be in two days. So what do you risk at trying with a sane, recent, version of gcc, instead of the prehistoric 2.95 version? becasue i want to compile linux 2.6 version kernel ,which require gcc2.95.3 Best regards Best regards, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
