luck/tmp_suning_uos_patched
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uprobes: Kill uprobe_consumer->filter()

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uprobe_consumer->filter() is pointless in its current form, kill it.

We will add it back, but with the different signature/semantics. Perhaps
we will even re-introduce the callsite in handler_chain(), but not to
just skip uc->handler().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
This commit is contained in:
Oleg Nesterov 2012-11-21 17:32:30 +01:00
parent f0744af7d0
commit fe20d71f25
3 changed files with 2 additions and 10 deletions
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5
include/linux/uprobes.h
View File

@ -37,11 +37,6 @@ struct inode;
struct uprobe_consumer {
int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
/*
* filter is optional; If a filter exists, handler is run
* if and only if filter returns true.
*/
bool (*filter)(struct uprobe_consumer *self, struct task_struct *task);
struct uprobe_consumer *next;
};

6
kernel/events/uprobes.c
View File

@ -477,10 +477,8 @@ static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs)
return;
down_read(&uprobe->consumer_rwsem);
for (uc = uprobe->consumers; uc; uc = uc->next) {
if (!uc->filter || uc->filter(uc, current))
uc->handler(uc, regs);
}
for (uc = uprobe->consumers; uc; uc = uc->next)
uc->handler(uc, regs);
up_read(&uprobe->consumer_rwsem);
}

1
kernel/trace/trace_uprobe.c
View File

@ -550,7 +550,6 @@ static int probe_event_enable(struct trace_uprobe *tu, int flag)
return -EINTR;
utc->cons.handler = uprobe_dispatcher;
utc->cons.filter = NULL;
ret = uprobe_register(tu->inode, tu->offset, &utc->cons);
if (ret) {
kfree(utc);