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sh@ubuntu:/home/ccpp/helloworld$ make
gcc-4.6 -O2 -DMODULE -D_KERNEL_ -W -Wall -Wstrict-prototypes -Wmissing-prototypes -isystem /lib/modules/`uname -r`/build/include   -c -o hello-1.o hello-1.c
hello-1.c:4:0: warning: "MODULE" redefined [enabled by default]
<command-line>:0:0: note: this is the location of the previous definition
hello-1.c:6:0: warning: "_KERNEL_" redefined [enabled by default]
<command-line>:0:0: note: this is the location of the previous definition
In file included from /lib/modules/3.2.0-25-generic/build/include/linux/list.h:4:0,
                 from /lib/modules/3.2.0-25-generic/build/include/linux/module.h:9,
                 from hello-1.c:7:
/lib/modules/3.2.0-25-generic/build/include/linux/types.h:13:2: warning: #warning "Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders" [-Wcpp]
In file included from /lib/modules/3.2.0-25-generic/build/include/linux/module.h:9:0,
                 from hello-1.c:7:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘INIT_LIST_HEAD’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:26:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:27:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__list_add’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:41:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:42:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:43:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:44:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_add’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:62:28: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_add_tail’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:76:22: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__list_del’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:88:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:89:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__list_del_entry’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:101:18: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:101:31: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_del’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:106:18: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:106:31: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:107:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:108:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_replace’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:125:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:125:17: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:126:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:127:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:127:17: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:128:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_is_last’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:179:13: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_empty’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:188:13: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_empty_careful’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:206:31: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:207:40: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_rotate_left’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:219:15: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_is_singular’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:230:35: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:230:49: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__list_cut_position’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:236:37: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:237:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:237:19: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:238:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:239:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:240:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:241:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:242:11: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_cut_position’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:265:8: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__list_splice’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:277:32: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:278:31: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:280:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:281:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:283:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:284:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_splice’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:296:33: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_splice_tail’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:308:27: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_splice_init’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:322:33: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘list_splice_tail_init’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:339:27: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘INIT_HLIST_NODE’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:572:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:573:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_unhashed’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:578:11: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_empty’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:583:11: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘__hlist_del’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:588:29: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:589:31: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:592:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_del’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:598:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:599:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_add_head’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:612:30: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:613:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:615:8: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:615:20: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:616:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:617:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:617:15: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_add_before’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:624:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:624:17: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:625:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:626:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:626:18: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:627:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_add_after’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:633:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:633:16: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:634:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:635:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:635:18: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:637:9: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:638:7: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:638:29: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_add_fake’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:644:3: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:644:15: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h: In function ‘hlist_move_list’:
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:654:5: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:654:18: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:655:9: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:656:6: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:656:27: error: dereferencing pointer to incomplete type
/lib/modules/3.2.0-25-generic/build/include/linux/list.h:657:5: error: dereferencing pointer to incomplete type
In file included from /lib/modules/3.2.0-25-generic/build/include/linux/module.h:12:0,
                 from hello-1.c:7:
/lib/modules/3.2.0-25-generic/build/include/linux/cache.h: At top level:
/lib/modules/3.2.0-25-generic/build/include/linux/cache.h:5:23: fatal error: asm/cache.h: No such file or directory
compilation terminated.
make: *** [hello-1.o] Error 1

i got this error after compiling an helloworld program my program is

#define MODULE
#define LINUX
#define _KERNEL_
#include <linux/module.h>
#include <linux/kernel.h>

int init_module(void)
{
    printk("<1>hello World 1.\n");
    return 0;
}

void cleanup_module(void)
{
    printk(KERN_ALERT "goodbye world 1.\n");
}

MODULE_LICENSE("GPL");

my make file is:

TARGET  := hello-1
WARN    := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
INCLUDE := -isystem /lib/modules/`uname -r`/build/include
CFLAGS  := -O2 -DMODULE -D_KERNEL_ ${WARN} ${INCLUDE}
CC  := gcc-4.6
${TARGET}.o: ${TARGET}.c

.PHONY: clean

clean:
    rm -rf ${TARGET}.o

iam usin kernel 3.2.0.25 as novice i can't able to figure out where the problem is I SEARCHED EVERY THING I CAN TO KNOW ABOUT THIS ERROR BUT I CANT UNDERSTAND &I GET IRRELEVANT DOCS anybody help me please

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2  
The hell is that.. –  Uri Herrera Jun 29 '12 at 1:46
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closed as not a real question by Uri Herrera, Florian Diesch, jokerdino, jrg Jul 12 '12 at 14:10

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

2 Answers

I suspect that you haven't installed all of the kernel's build dependencies.

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sorry for inconvenience ; but thanks for your help –  wati Jun 29 '12 at 4:50
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1.c:4:0: warning: "MODULE" redefined [enabled by default]
<command-line>:0:0: note: this is the location of the previous definition
hello-1.c:6:0: warning: "_KERNEL_" redefined [enabled by default]

Read the compiler's output and act accordingly before asking for help...

I am pretty sure you messed up kernel defines by setting those yourself.

If that does not work, simplify your Makefile and try again.

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