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

[Masami Hiramatsu]

On Thu, 29 Nov 2018 16:53:30 +0000
Catalin Marinas <catalin.marinas@xxxxxxx> wrote:

> 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.

Thank you Catalin!

> 
> -- 
> Catalin


-- 
Masami Hiramatsu <mhiramat@xxxxxxxxxx>