* Returns NULL if the posix_clock instance attached to 'fp' is old and stale. And its pretty small: int krefput(struct kref kref. */ # include # include # include # include # include # include # include static void delete_clock ( struct kref * kref ) /* From: Al Viro <> Newsgroups: fa.linux.kernel Subject: Re: Top 10 kernel.* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. I/O devices use a third kind of address: a bus address. The physical address is not directly useful to a driver it must use ioremap () to map the space and produce a virtual address. * along with this program if not, write to the Free Software The kernel manages device resources like registers as physical addresses. * You should have received a copy of the GNU General Public License * GNU General Public License for more details. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * but WITHOUT ANY WARRANTY without even the implied warranty of * This program is distributed in the hope that it will be useful, * the Free Software Foundation either version 2 of the License, or If you want refcounts, krefs are the way to go. If you have objects that are used in multiple places and passed around, and you don't have refcounts, your code is almost certainly broken. * it under the terms of the GNU General Public License as published by krefs allow you to add reference counters to your objects. * This program is free software you can redistribute it and/or modify * Copyright (C) 2010 OMICRON electronics GmbH bitbash.* posix-clock.c - support for dynamic clock devices It does not take attachment, but the file is here: Has writel and readl functions changed somehow, because compiler warns about some integer to pointer type confusion? This compiles fine with kernel source 3.1.10 but not with 3.12 or 3.13. Is there anyone to tell what has changed so much, it will not compile the attached file for me? I can't find any reason for it. The only thing still not working with this little devil is the rtc support. U-boot and uImage along with device tree file should then all be put in /boot folder of the ext4 partition. Stage1 is the only file to put to the unformatted part of the disk. Then leave a tiny part of the disk unpartitioned (for stage1 file) and partition and format rest of it as ext4. So, it's even possible to make a GPT partition table. Just make default config for ext4 before compiling u-boot. No need to flash anything while updating the system. Stage1 can load the rest from an ext4 partition too, so you don't need any fat partition at all and even u-boot.img can be as a regular file in the ext4 partition. KASLR acts as a kernel space mitigation to make control flow jacking attacks harder by randomizing the base address of the kernel on. This Akitio device boots fine with the same address too, but kernel and dtb files can't be concatenated. You can quote by just first pressing "Post reply" button and making guote after that. Thank you! Out of curiosity, why is 60500000 the right address? and that worked! The kernel booted without problems. To do this, call krefinit as so: struct mydata data data kmalloc (sizeof (data), GFPKERNEL) if (data) return -ENOMEM krefinit (&data->refcount) This sets the refcount in the kref to 1. Weird.Īnyway, to quote Geoff manually: "You have to load and boot the kernel at 60500000". Initialization You must initialize the kref after you allocate it. when I tried to quote Geoff's reply to me, the board told me the topic was too old. It will also cover a few directions that these structures might be taking in the future. As the Linux kernel maintainer for the -stable branch, the staging subsystem, USB, driver core, debugfs, kref, kobject, and the sysfs kernel subsystems. It will cover why they were created, how to use them, and how the internals work. 67 waitqueueheadt bulkinwait / to wait for an ongoing read /. $this->bbcode_second_pass_quote('jbrnd', 'H')mm. This paper will describe the current kobject and kref kernel structures in detail. 66 struct mutex iomutex / synchronize I/O with disconnect /.
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