Can not modprobe any driver

[Altera_Forum]

Hi guys 

 I have strange situation. Some time ago I realized that I can not load any module to Linux (I'm working with MMU). I wrote then simple driver to check: # include <linux/init.h># include <linux/module.h>     static int __init hello_init(void) { printk(KERN_ALERT "Hello module is running\n");   return 0; }   static void __exit hello_exit(void) { printk(KERN_ALERT "Hello module is exit\n"); }   module_init(hello_init); module_exit(hello_exit);  When I use this drives as module in configuration, I put modprobe hello and system hangs. But when I add this driver to the kernel as static driver this driver is loading without problems. I see on the console:ttyJ0 at MMIO 0x4001450 (irq = 2) is a Altera JTAG UART console [ttyJ0] enabled, bootconsole disabled console [ttyJ0] enabled, bootconsole disabled ttyS0 at MMIO 0x4001400 (irq = 1) is a Altera UART hello module is running mice: PS/2 mouse device common for all mice TCP cubic registered NET: Registered protocol family 17 Freeing unused kernel memory: 2720k freed (0xc21cd000 - 0xc2474000) Welcome to  ____ _ _  / __| ||_|   _ _| | | | _ ____ _ _ _ _   | | | | | | || | _ \| | | |\ \/ /  | |_| | |__| || | | | | |_| |/   | ___\____|_||_|_| |_|\____|\_/\_/  | |  |_|   For further information check: http://www.uclinux.org/       BusyBox v1.16.2 (2013-06-14 13:30:28 CEST) hush - the humble shell Enter 'help' for a list of built-in commands.   root:/>   What is here going on? Why I can not load any driver? When I use insmod the situation is the same... :/

[Altera_Forum]

Hi, 

   --- Quote Start ---  When I use this drives as module in configuration, I put modprobe hello and system hangs. But when I add this driver to the kernel as static driver this driver is loading without problems.   --- Quote End ---    Please refer the next once.   http://www.alteraforum.com/forum/showthread.php?t=18802&page=5 # 48  Kazu

[Altera_Forum]

That's great! :) 

 I made changees as you mentioned in kernel.c for using kmalloc intead vmalloc and now loading modules is working.  But this situation is really really strange. I used insmod while I was programming my module for custom hardware in FPGA in two last weeks. I loaded modules via NFS. Everything was ok... When my driver was finished I changed to put it into the kernel and I didn't use dynamic loading. And sometime ago I tried load the driver again and it was not working... I didn't know what was going on. But now when I made changes as you Kazu said it comes back to work... But befere it wokrs with vmalloc I think..