Messages in this thread Patch in this message | | | Date | Thu, 18 Dec 2014 09:49:35 -0600 | From | Josh Poimboeuf <> | Subject | [PATCH] livepatch: use FTRACE_OPS_FL_IPMODIFY |
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On Thu, Dec 18, 2014 at 08:55:21PM +0900, Masami Hiramatsu wrote: > (2014/12/17 2:58), Seth Jennings wrote: > > changes in v7: > > - TODO: set IPMODIFY (not a blocker to moving forward) > > Why don't you set this? > IPMODIFY series are not completely applied yet, but you can already > use the flag. All you need is just set it :)
Yeah, I don't see any reason why we can't start using this flag now. How about we add this patch to the queue?
-->8--
Subject: livepatch: use FTRACE_OPS_FL_IPMODIFY
Use the FTRACE_OPS_FL_IPMODIFY flag to prevent conflicts with other ftrace users who also modify regs->ip.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> --- kernel/livepatch/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 0004a71..bdd99975 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -640,7 +640,8 @@ static int klp_init_func(struct klp_object *obj, struct klp_func *func) ops->private = func; ops->func = klp_ftrace_handler; - ops->flags = FTRACE_OPS_FL_SAVE_REGS | FTRACE_OPS_FL_DYNAMIC; + ops->flags = FTRACE_OPS_FL_SAVE_REGS | FTRACE_OPS_FL_DYNAMIC | + FTRACE_FL_IPMODIFY; func->fops = ops; func->state = KLP_DISABLED; -- 2.1.0
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