Messages in this thread | | | Date | Sun, 8 Jun 2008 21:59:21 +0400 | From | Alexey Dobriyan <> | Subject | Re: Create proc entry under /proc/sys/kernel |
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On Mon, Jun 09, 2008 at 01:44:57AM +0800, RuoMu Hu wrote: > Alexey Dobriyan wrote: >> On Sun, Jun 08, 2008 at 04:00:57PM +0800, RuoMu Hu wrote: >> >>> Is it possible to create a proc entry under /proc/sys/kernel directly by >>> create_proc_read_entry in the way shown below? >>> >> >> No longer. >> >> >>> test_pde = create_proc_read_entry("/proc/sys/kernel/test", 0, NULL, >>> test_read_proc, NULL); >>> if (test_pde == NULL) { >>> printk(KERN_ERR "Failed to create the test proc file.\n"); >>> return -ENOMEM; >>> } >>> >>> I'm using this in my kernel module but create_proc_read_entry always >>> returns fail, while there's no problem creating proc entries directly >>> under /proc. The kernel source I'm building my kernel module against is >>> 2.6.25.4. >>> >> >> Use register_sysctl_table() for sysctls. >> > > Thank you for your hint, it really helped me. > > Another question: Is it possible to add an entry under /proc/sys/kernel by > register_sysctl_table() without modifying kernel source (adding an entry to > the kern_table[] array in kernel/sysctl.c)?
Yes.
grep for register_sysctl_table and you'll see how.
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