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hi all: i followed the <The Linux Kernel Module Programming Guide>, and wrote a module hello-1.c: Code: #include <linux/module.h> #include <linux/kernel.h> int init_module(void) { printk("<1>Hello world 1.\n"); return 0; } ...
  1. 12-14-2005 #1
    Final
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    no previous prototype for `init_module'



    hi all:
    i followed the <The Linux Kernel Module Programming Guide>, and wrote a module hello-1.c:
    Code:
    #include <linux/module.h>
#include <linux/kernel.h>

int init_module&#40;void&#41;
&#123;
        printk&#40;"<1>Hello world 1.\n"&#41;;

        return 0;
&#125;

void cleanup_module&#40;void&#41;
&#123;
        printk&#40;KERN_ALERT "Goodbye world 1.\n"&#41;;
&#125;
    meanwhile i built a makefile:
    Code:
    TARGET  &#58;= hello-1
WARN    &#58;= -W -Wall -Wstrict-prototypes -Wmissing-prototypes
INCLUDE &#58;= -isystem /lib/modules/`uname -r`/build/include
CFLAGS  &#58;= -O2 -DMODULE -D__KERNEL__ $&#123;WARN&#125; $&#123;INCLUDE&#125;
CC      &#58;= gcc

$&#123;TARGET&#125;.o&#58; $&#123;TARGET&#125;.c
    but, when i executed the make command, i have gotten these:
    Code:
    hello-1.c&#58;5&#58; warning&#58; no previous prototype for `init_module'
hello-1.c&#58;12&#58; warning&#58; no previous prototype for `cleanup_module'
/lib/modules/2.4.20-8/build/include/asm/processor.h&#58; In function `copy_segments'&#58;
/lib/modules/2.4.20-8/build/include/asm/processor.h&#58;456&#58; warning&#58; unused parameter `p'
/lib/modules/2.4.20-8/build/include/asm/processor.h&#58;456&#58; warning&#58; unused parameter `mm'
/lib/modules/2.4.20-8/build/include/asm/processor.h&#58; In function `release_segments'&#58;
/lib/modules/2.4.20-8/build/include/asm/processor.h&#58;457&#58; warning&#58; unused parameter `mm'
/lib/modules/2.4.20-8/build/include/linux/prefetch.h&#58; In function `prefetch'&#58;
/lib/modules/2.4.20-8/build/include/linux/prefetch.h&#58;43&#58; warning&#58; unused parameter `x'
/lib/modules/2.4.20-8/build/include/linux/prefetch.h&#58; In function `prefetchw'&#58;
/lib/modules/2.4.20-8/build/include/linux/prefetch.h&#58;48&#58; warning&#58; unused parameter `x'
    what is wrong with it? who would tell me? many thanks!!!
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  2. 12-14-2005 #2
    lakerdonald
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    I see no errors, only warnings...So what's the big deal?
    the lost art of found sound
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  3. 12-15-2005 #3
    Final
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    Quote Originally Posted by lakerdonald
    I see no errors, only warnings...So what's the big deal?
    yes, there were only warnings.
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  4. 12-15-2005 #4
    lakerdonald
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    So what's the probrlem?
    the lost art of found sound
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  5. 12-15-2005 #5
    Final
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    Quote Originally Posted by lakerdonald
    So what's the probrlem?
    sorry, i could not point it out. would you tell me the reason?
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