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POLinux SLAB_CTOR_VERIFY and cache undeclared
 

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  1. POLinux SLAB_CTOR_VERIFY and cache undeclared
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    <p>I try to compile a program, that serves as a example how storage allocation works.</p> <p>The compiler gives me a error, that 'cache' and 'SLAB_CTOR_VERIFY' is undeclared.</p> <p>I can not find the declaration in my whole Kernel project ( Linux Kernel 2.6.32 ).</p> <p>Maybe there are some replacements or something like that.</p> <p>I found nothing in the web about that, but maybe some of you can give me a clue.</p> <p>Here is the Sourcecode:</p> <pre><code>#include &lt;linux/module.h&gt; #include &lt;linux/completion.h&gt; #include &lt;linux/slab.h&gt; static int thread_id=0; static DECLARE_COMPLETION( on_exit ); static kmem_cache_t *cache; struct linobj { int dummy_i, dummy_j, dummy_k; char dummy_feld[250]; wait_queue_head_t wq; }; static void linobj_destructor(void *objp, kmem_cache_t *cache, unsigned long flags) { printk("linobj_destructor( %p )\n", objp); return; } static void linobj_constructor(void *objp, kmem_cache_t *cache, unsigned long flags) { struct linobj *ptr = (struct linobj *)objp; if( flags &amp; SLAB_CTOR_VERIFY ) return; printk("linobj_constructor( %p )\n", objp); init_waitqueue_head(&amp;ptr-&gt;wq); return; } static int thread_code( void *data ) { unsigned long timeout, retvalue; int i; struct linobj *obj; daemonize("linobj-test"); allow_signal( SIGTERM ); for( i=0; i&lt;5; i++ ) { obj = (struct linobj *)kmem_cache_alloc( cache, GFP_KERNEL ); printk("objadr=%p\n", obj ); timeout=HZ; retvalue=schedule_timeout_interruptible(timeout); kmem_cache_free( cache, obj ); if( retvalue ) break; } complete_and_exit( &amp;on_exit, 0 ); } static int __init slab_init(void) { cache = kmem_cache_create( "linobj", sizeof(struct linobj), 0, 0, linobj_constructor, linobj_destructor ); if( !cache ) return -EFAULT; thread_id=kernel_thread( thread_code, NULL, CLONE_KERNEL ); if( thread_id==0 ) { kmem_cache_destroy( cache ); return -EIO; } return 0; } static void __exit slab_exit(void) { kill_pid( find_vpid(thread_id), SIGTERM, 1 ); wait_for_completion( &amp;on_exit ); if( cache ) kmem_cache_destroy( cache ); } module_init( slab_init ); module_exit( slab_exit ); MODULE_LICENSE("GPL"); </code></pre> <p>Thanks in advance</p> <p>Peter</p>
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