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Subject[PATCH v2 13/39] x86/livepatch: Validate __fentry__ location
Currently livepatch assumes __fentry__ lives at func+0, which is most
likely untrue with IBT on. Instead make it use ftrace_location() by
default which both validates and finds the actual ip if there is any
in the same symbol.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/include/asm/livepatch.h | 9 +++++++++
kernel/livepatch/patch.c | 2 +-
2 files changed, 10 insertions(+), 1 deletion(-)

--- a/kernel/livepatch/patch.c
+++ b/kernel/livepatch/patch.c
@@ -133,7 +133,7 @@ static void notrace klp_ftrace_handler(u
#ifndef klp_get_ftrace_location
static unsigned long klp_get_ftrace_location(unsigned long faddr)
{
- return faddr;
+ return ftrace_location(faddr);
}
#endif


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