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s390/bpf,jit: call module_free() from any context 

The workqueue workaround is no longer needed. Same as 5199dfe531
"sparc: bpf_jit_comp: can call module_free() from any context".

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2013-07-16 10:24:48 +02:00 committed by Martin Schwidefsky
parent dae7fd4296
commit 1eeb74782d
1 changed files with 3 additions and 17 deletions
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20
arch/s390/net/bpf_jit_comp.c
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@ -772,8 +772,7 @@ void bpf_jit_compile(struct sk_filter *fp)
} else if (jit.prg == cjit.prg && jit.lit == cjit.lit) {
prg_len = jit.prg - jit.start;
lit_len = jit.lit - jit.mid;
size = max_t(unsigned long, prg_len + lit_len,
sizeof(struct work_struct));
size = prg_len + lit_len;
if (size >= BPF_SIZE_MAX)
goto out;
jit.start = module_alloc(size);
@ -804,21 +803,8 @@ out:
kfree(addrs);
}
static void jit_free_defer(struct work_struct *arg)
{
module_free(NULL, arg);
}
/* run from softirq, we must use a work_struct to call
* module_free() from process context
*/
void bpf_jit_free(struct sk_filter *fp)
{
struct work_struct *work;
if (fp->bpf_func == sk_run_filter)
return;
work = (struct work_struct *)fp->bpf_func;
INIT_WORK(work, jit_free_defer);
schedule_work(work);
if (fp->bpf_func != sk_run_filter)
module_free(NULL, fp->bpf_func);
}