Re: [PATCH v2] arm64: ftrace: Fix to enable syscall events on arm64

[Catalin Marinas]

On Thu, Nov 29, 2018 at 02:39:33PM +0900, Masami Hiramatsu wrote:
> Since commit 4378a7d4be30 ("arm64: implement syscall wrappers")
> introduced "__arm64_" prefix to all syscall wrapper symbols in
> sys_call_table, syscall tracer can not find corresponding
> metadata from syscall name. In the result, we have no syscall
> ftrace events on arm64 kernel, and some bpf testcases are failed
> on arm64.
> 
> To fix this issue, this introduces custom
> arch_syscall_match_sym_name() which skips first 8 bytes when
> comparing the syscall and symbol names.
> 
> Fixes: 4378a7d4be30 ("arm64: implement syscall wrappers")
> Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
> Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> Acked-by: Will Deacon <will.deacon@xxxxxxx>
> Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

Queued for 4.20. Thanks.

-- 
Catalin