uprobes: Kill uprobe_consumer->filter()

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>

1 files changed, 2 insertions, 4 deletions

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index a39d8163b713..5cbebac27c01 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -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);
 }