From: Vasily Gorbik gor@linux.ibm.com
[ Upstream commit cbdaeaf050b730ea02e9ab4ff844ce54d85dbe1d ]
Selecting HAVE_NOP_MCOUNT enables -mnop-mcount (if gcc supports it) and sets CC_USING_NOP_MCOUNT. Reuse __is_defined (which is suitable for testing CC_USING_* defines) to avoid conditional compilation and fix the following gcc 9 warning on s390:
kernel/trace/ftrace.c:2514:1: warning: ‘ftrace_code_disable’ defined but not used [-Wunused-function]
Link: http://lkml.kernel.org/r/patch.git-1a82d13f33ac.your-ad-here.call-0155973271...
Fixes: 2f4df0017baed ("tracing: Add -mcount-nop option support") Signed-off-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/trace/ftrace.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index b920358dd8f7..538f0b1c7ea2 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2939,14 +2939,13 @@ static int ftrace_update_code(struct module *mod, struct ftrace_page *new_pgs) p = &pg->records[i]; p->flags = rec_flags;
-#ifndef CC_USING_NOP_MCOUNT /* * Do the initial record conversion from mcount jump * to the NOP instructions. */ - if (!ftrace_code_disable(mod, p)) + if (!__is_defined(CC_USING_NOP_MCOUNT) && + !ftrace_code_disable(mod, p)) break; -#endif
update_cnt++; }