Re: Linux release & branch management
On Thu, Nov 16, 2017 at 1:27 AM, Anand Arumugam <anand.aru...@gmail.com> wrote: > Hello All, > > I am looking for some good wiki or documentation about about Linux branches > and release management. I have read in the web about the benevolent dictator > model of git is used by Linus. But what I'm looking for is the actual > logistical details like what are the official blessed repos/branches that > Linus' lieutenants use and where does the patch submitted by any contributor > get to and how does it get to, etc. The recent email thread on submitting > patches to Linus triggered this question for me. look at https://elixir.free-electrons.com/linux/latest/source/MAINTAINERS -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: How to find closest tag when using git-bisect?
On Thu, Sep 8, 2016 at 12:56 PM, Louie Lu <louie...@hopebaytech.com> wrote: > Hi everyone, > > I'm trying to git-bisect for debugging, but how can I find the tag I need? > > for example, I'm find the file change at maybe commit > fc2bd799c7c79c84a59da6f9221370bc6f38c503, how to find the closest tag > for this commit? This is literally the first link you get on google when searching for "closest tag for this commit" https://git-scm.com/docs/git-describe > and a anther question is, is every bisect need to recopmile all kernel > code by `make`? or just need to build the thing I need? Question is not clear. You need to recompile at each step. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: list etiquette
On Tue, Jun 7, 2016 at 7:40 PM, <mhornung.li...@gmail.com> wrote: > Hi Tobin, > > On Mon, 06. Jun 18:53, Tobin Harding wrote: >> LKML list etiquette question. >> >> When asking a [simple] question that receives an suitable answer is it >> correct >> etiquette to reply with a thank you email or is this just adding noise to the >> list? > > Someone reading your question (and the suitable answer) later on might wonder > if the answer was correct or not. So yes, it is always useful to reply with a > "thank you" if the answer was correct and useful. This generates useless spam and traffic in a ml that already counts hundreds of mails per day. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: USB device debugging
On Tue, May 24, 2016 at 9:39 AM, Narasimha M <mnarasimha...@gmail.com> wrote: > Hi All, > Could you please help in checking receive packet flow from USB driver. https://wiki.wireshark.org/CaptureSetup/USB -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: LINKS PLEASE
On Tue, May 17, 2016 at 11:00 AM, Robert P. J. Day <rpj...@crashcourse.ca> wrote: > On Tue, 17 May 2016, Gnoleba GNOGBO wrote: > >> Hi ! >> I am beginning my learn of Linux ! >> Can you show (give) me the good link for : >> >> 1. the management of the all memory in Linux ( Rom, Ram, cache, Registers, >> swap and fs) >> 2. the management of the all process (initialization, user process, kernel >> process ) >> 3. the all tables in memory to manage the data and process >> >> Regards >> >> Gnoleba > > there is no way this is serious. I always wonder why people never ask something like "How do I turn a LED on and off with a GPIO?" ;-) -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Can I just remove code of other architectures and get a clean X86 source
On Thu, May 12, 2016 at 2:50 PM, walkerlala <ablacktsh...@gmail.com> wrote: > Hi everyone. > I am just reading the kernel code, adding some code to make it > pause and print some text and then interact with it a little bit. I have > compile the kernel successfully and run the kernel in QEMU. It did > work.Nice. > But, when I reading the source, I found that there are just too > many files there, which make it hard for me to manage. With so many > files, It's hard to change directories, read and modified and still > remember what you are doing (so many files with the same/similar name). > I know that's because Linux support many architectures, and that 's > the reason why there are so many folders under the 'arch' directory of > the source code. > So, I wonder, as I only want the source for x86 device, can I > simply remove that source files which are unrelated to x86 and still > make the kernel work as normal? I mean, can I just remove all the > directory under 'arch' except 'x86-64' ? Also, are there any other files > that I can safely removed and won't hurt the kernel ? > Thanks in advance. > (btw, I don't know whether this question is asked before. I google > it but find nothing related. If it's duplicated, please give me some > pointer to the mailing list where this topic located ) Navigate with cscope only on one architecture: make ARCH=arm cscope -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Question about cc:stable and git send-email
On Mon, Apr 25, 2016 at 10:06 AM, Ricardo Ribalda Delgado <ricardo.riba...@gmail.com> wrote: > Hello > > I was trying to do The right thing (TM) with a patch for a regression. > I did my homework and found which commit introduced the error using > git blame and also found out when that commit was introduced using git > describe. > > I added the tags: > > Fixes: XXX () > CC: sta...@vger.kernel.org # 4.4.x- No need for # .. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Possible Bug
On Thu, Mar 31, 2016 at 5:08 PM, Roger H Newell <newell.ro...@gmail.com> wrote:
> On Thu, Mar 31, 2016 at 12:18 PM, nick <xerofo...@gmail.com> wrote:
>>
>>
>> On 2016-03-31 08:34 AM, Roger H Newell wrote:
>> In the fs/file_table.c file as from the root directory of your kernel tree
>> change in the function,
>> get_empty_flip change these lines:
>> if (unlikely(error)) {
>> file_free(f);
>> return ERR_PTR(error);
>> }
>> to:
>> if (unlikely(error))
>> return ERR_PTR(error);
>> and tell me if that fixes your issue.
>> Nick
>
>
> Seems to have worked, the error is is gone and I can mount the USB device.
That's not a fix, you are leaking f.
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Re: unregister_input_polled_device() leads to null pointer deref
On Mon, Mar 28, 2016 at 3:32 PM, Okash Khawaja <okash.khaw...@gmail.com> wrote: > Hi, > > I'm writing a i2c device driver. In probe(), among other things I call: > > polled_input = input_allocate_polled_device(); > input_register_polled_device(polled_input); > > Then inside remove(), I extract the instance of input_polled_dev and > call > > input_unregister_polled_device(polled_input); > > This results in kernel error: > > "Unable to handle kernel NULL pointer dereference at virtual address > 0474". > > It turns out that the input_dev pointer inside input_polled_dev is null > which leads to this error. But why is input_dev pointer null? It is not > null inside probe() function and I don't release it anywhere. > > This is code: http://pastebin.com/JJdepyEG and here is link to the output, > along with my log statements: http://pastebin.com/badwSvyy. > input_free_polled_device(polled_input) is always called in your probe function. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: ARM Linux: Where the SDRAM address and size defined
On Mon, Mar 7, 2016 at 11:04 AM, <f...@code-libre.org> wrote:
> On Mon, Mar 07, 2016 at 01:25:25PM +0800, Woody Wu wrote:
>> Hi,
>
> Hello,
>
>> In Samsung s3c24xx arch code, I cannot find where the SDRAM address and
>> size information was defined. Can someone give me a lead? Thanks.
>
> ARM boards, are now defined using Device Tree (DTS for source, DTB for
> binary, the compiled form).
> I couldn't find out for s3c24xx but, the block memory is defined as follow:
>
> memory {
> reg = <0x2000 0x2000>;
> };
>
For the record. The memory node in the DTS is most of the time useless
/ there for documentation since the node is overwritten by the
bootloader who is in charge to initialized the DRAM.
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Re: Finding when a chip was supported in the kernel
On Mon, Feb 15, 2016 at 3:44 PM, Rob Groner <rgro...@rtd.com> wrote: > > > Is there some specific place/way I can find the specific kernel version when > support for an arbitrary chip was added? An example is the Intel 82574 > Ethernet chip. I’m finding that google is failing me for finding the > specific kernel of inclusion. This comes up somewhat often here at work > (having to determine how far back our Linux support goes), so I’m trying to > find the best way to determine this. git log --reverse $driver git describe --contains $SHA -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Got wrongly (I hope) banned from eudyptula challenge
On Thu, Oct 8, 2015 at 9:40 PM, Vinicius Tinti <viniciusti...@gmail.com> wrote: > Hi, > > I think I got banned from Eudyptula Challenge because my last mail > which I asked people to check if they received their answer from > Little. > > Who could I ask to verify and see that I have not violated the terms in > Little? This is not the right list to ask about this kind of stuff. It's getting annoying. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: refrence to communicate with hardware
On Mon, Jun 15, 2015 at 10:44 AM, john byron newmr.cyber...@yahoo.com wrote: Anyone know where i need to do/read to know all the flag (or something else in low level, or bit level) to communicate with hardware ? datasheet? -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Query on device tree phandles
On Mon, May 25, 2015 at 11:02 AM, victorascr...@gmail.com wrote:
Hello,
I have a query related to device tree. If I have three nodes as below
node1: node1@addr1 {
compatible =name1, syscon;
}
node2: node1@addr2 {
compatible =name2, syscon;
}
node3: node1@addr3 {
compatible =name3, syscon;
}
At the top soc node, I define phandles as follows
node-phandle1 = node1 0x10
node-phandle2 = node2 0x20
node-phandle3 = node3 0x30
How can I read the values of 0x10, 0x20 and 0x30 while using the node-phandlex
property? Is it possible using one of the of_* functions?
The driver binds to one of the syscon nodes above lets say node3.
http://lxr.free-electrons.com/source/drivers/of/base.c#L1597
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Re: Appropriate method of io remapping a single memory location?
On Tue, May 5, 2015 at 3:29 PM, maitysancha...@gmail.com wrote: Thanks for the reply. Hmm... I did not think of a DT entry as it is a single location and not part of any particular peripheral. Not even mentioned in the memory map. That's why I suggested to use a syscon device. I tried grepping for ioremap functions instead of devm ones and saw one instance and I wrote mine like this rom_rev = ioremap(ROM_REVISION_REGISTER, SZ_1); if (rom_rev) soc_dev_attr-revision = kasprintf(GFP_KERNEL, %08x, readl(rom_rev)); Is something like this valid? Or use of devm_* functions is recommeneded? Since this ioremap is gonna be called from a function which is bound to the .init_machine entry of DT_MACHINE_START any harm in doing this ioremap directly or the DT method would be recommended? I guess that DT is always recommended. I would use something like of_find_compatible_node() + of_iomap() on the syscon device for that (after of_platform_populate()). Probably you could use also directly the physical location or a iotable but it is definitely uglier IMO. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Checkpatch Patches
On Tue, Sep 16, 2014 at 5:44 PM, Nick Krause xerofo...@gmail.com wrote: On Tue, Sep 16, 2014 at 10:19 AM, valdis.kletni...@vt.edu wrote: On Tue, 16 Sep 2014 08:44:27 -0400, nick said: I am attaching two check patch patches I wrote in the last few days as I am unable to get a reply from the maintainers. Would someone please send them off for me. I am attaching. Fail 3 words in. That's why you aren't getting a reply from the maintainers. They don't bother reading patches they know will probably *never* be correct. And yes, at least one of the two patches is incorrect. Thanks for the Help, I really do appreciate it and I do understand how much I have screwed up. My concern now is now to make it right. You don't make it right by posting more wrong patches. Now do us all a favor and *stop* being either an idiot, or a troll, or whatever your problem is. We have *zero* desire to see *any* more patches from somebody who is either unable or unwilling to post a *single* correct patch after *two months* of trying. So please do us a favor and go piss off some other open source project. THE KERNEL DOES NOT WANT YOUR BULLSHIT. I am going to attach it again and I understand Valdis. I am going to talk to Sudip about reading and checking my patches first. Rik, probably it's time to ban Nick also from this ml. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Rep Improvement
On Sun, Sep 07, 2014 at 07:06:37PM +0100, Hugo Mills wrote: On Sun, Sep 07, 2014 at 01:26:20PM -0400, nick wrote: Hey Guys, I seem to be unable to read the list now :(. Assuming you're talking about the linux-kernel list, you've probably been unsubbed by the mailing list software on vger. It does this if it gets too many errors from your mail server. This can happen with even a short transient outage that you wouldn't otherwise notice -- the list software has something of a hair trigger on these matters. It happens to everyone at some point... I would suggest simply resubscribing, and only start worrying about it if you can't resubscribe. He was banned. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Query on linker scripts
On 24/03/2012 05:43, Vaibhav Jain wrote:
Hi,
[cut]
is confusing. An example is the use of symbols sbss and ebss in the bss
section as show in the script below
ENTRY (loader)
SECTIONS
{
. = 0x0010;
.text ALIGN (0x1000) :
{
*(.text)
}
.rodata ALIGN (0x1000) :
{
*(.rodata*)
}
.data ALIGN (0x1000) :
{
*(.data)
}
.bss :
{
sbss = .;
*(COMMON)
*(.bss)
ebss = .;
}
}
I'm not sure if you are OT, anyway...
i.e. they are useful if you want to clear the bss section before execution.
[snippet for ARM proc]
...
ldr r2, =_sbss
b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
movsr3, #0
str r3, [r2], #4
LoopFillZerobss:
ldr r3, = _ebss
cmp r2, r3
bcc FillZerobss
...
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Re: UART and servo controller
On 15/03/2011 00:50, Greg KH wrote: It's a mess to do this, it would be easier, and simpler, to just do this all from userspace, which is where the kernel is expecting this to come from. You can hook into an existing serial port, talking to the tty device, but it is difficult and not anything I would recommend as a simple kernel module, sorry. good luck, Thank you for the reply. I thought it was simpler. It is always hard to find out a kernel area simple enough to make experiments that are at the same time somehow useful. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
UART and servo controller
Hi, as an exercise I was trying to write a very simple module to drive a micro serial servo controller. This servo controller should be interfaced through a RS232-UART converter to a free UART port on the OMAP processor present on a beagleboard. This servo controller is very simple: the serial commands are given through serial port following a strict protocol. The idea was to create an ad-hoc character driver and interact with it using ioctl() (or procfs) to give commands to the motors (which motor to move and the final position). To learn about serial and UART drivers I was looking at the serial drivers for the omap (drivers/serial/omap-serial.c) but I suspect that this is not the right choice. The problem is that I don't want a serial device (/dev/ttyXX) the user can interact with (i.e. reading or writing to). The user should be able just to use ioctl() on an ad-hoc character device (i.e. /dev/motors) whereas the communication part through the UART and the communication protocol (configuration of the packet to send) should be up to the driver, in a transparent way. Now my question is: * How can I manage to hide the serial communication part into the driver (kernel), exposing to the user just an ad-hoc character device? It is enough for me a pointer to a driver similar to mine to take a look at the code. I suspect that I should use the UART driver because I need to set the communication parameters such as baudrate, parity and so on. But also when I use uart_register_driver() to register the driver I need (need?) e pointer to the console structure and this is not I want. Thank you and sorry for the noob question. -- Carlo Caione ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
