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riscv: remove unused variable in ftrace 

Noticed while building kernel-4.20.0-0.rc5.git2.1.fc30 for
Fedora 30/RISCV.

[..]
BUILDSTDERR: arch/riscv/kernel/ftrace.c: In function 'prepare_ftrace_return':
BUILDSTDERR: arch/riscv/kernel/ftrace.c:135:6: warning: unused variable 'err' [-Wunused-variable]
BUILDSTDERR:   int err;
BUILDSTDERR:       ^~~
[..]

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
Fixes: e949b6db51 ("riscv/function_graph: Simplify with function_graph_enter()")
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
David Abdurachmanov 2018-12-06 11:26:26 +01:00 committed by Palmer Dabbelt
parent cd378dbb3d
commit 397182e0db
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1 changed files with 0 additions and 1 deletions
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arch/riscv/kernel/ftrace.c
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@ -132,7 +132,6 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
{
unsigned long return_hooker = (unsigned long)&return_to_handler;
unsigned long old;
int err;
if (unlikely(atomic_read(&current->tracing_graph_pause)))
return;