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x86: bpf_jit_comp: can call module_free() from any context

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It looks like we can call module_free()/vfree() from softirq context,
so no longer need a wrapper and a work_struct.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-05-16 19:45:30 +00:00 committed by David S. Miller
parent b4236daa41
commit 650c849670
1 changed files with 3 additions and 17 deletions
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20
arch/x86/net/bpf_jit_comp.c
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@ -717,9 +717,7 @@ cond_branch: f_offset = addrs[i + filter[i].jf] - addrs[i];
break;
}
if (proglen == oldproglen) {
image = module_alloc(max_t(unsigned int,
proglen,
sizeof(struct work_struct)));
image = module_alloc(proglen);
if (!image)
goto out;
}
@ -738,20 +736,8 @@ out:
return;
}
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)
{
if (fp->bpf_func != sk_run_filter) {
struct work_struct *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);
}