2010/5/6 Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>:
> Changli Gao wrote:
>> struct kvfree_work_struct {
>> struct work_struct work;
>> void *head;
>> void **ptail;
>> };
>
> I wonder why "struct kvfree_work_struct" is needed.
> According to http://kernel.ubuntu.com/git?p=jj/ubuntu-lucid.git;a=blobdiff;f=security/apparmor/match.c;h=d2cd55419acfcae85cb748c8f837a4384a3a0d29;hp=afc2dd2260edffcf88521ae86458ad03aa8ea12c;hb=f5eba4b0a01cc671affa429ba1512b6de7caeb5b;hpb=abdff9ddaf2644d0f9962490f73e030806ba90d3 ,
>
> static void kvfree_work(struct work_struct *work)
> {
> vfree(work);
> }
>
> void kvfree_inatomic(void *ptr, size_t size)
> {
> if (size < PAGE_SIZE) {
> kfree(ptr);
> } else if (is_vmalloc_addr(ptr)) {
> /*
> * We can embed "struct work_struct" inside *ptr
> * because size >= PAGE_SIZE.
> */
> struct work_struct *work = ptr;
> BUILD_BUG_ON(sizeof(struct work_struct) > PAGE_SIZE);
> INIT_WORK(&work, kvfree_work);
> schedule_work(&work);
&work should be work. It is a much better idea. thanks very much.
> } else {
> free_pages_exact(ptr, size);
> }
> }
>
> should do what you want. (Though, I didn't test it.)
>
--
Regards，
Changli Gao(xiaosuo@xxxxxxxxx)
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
