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| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-06-05 13:11:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-10 09:53:40 +0200 |
| commit | 220adcc0e0ca7bd07022077909775fc53f9dc225 (patch) | |
| tree | b86a344dee4d8172b126bd69d5457c275d4e3f44 | |
| parent | 79fccb9815db7f8132c26cf9c9fd336b81470f5d (diff) | |
| download | linux-stable-220adcc0e0ca7bd07022077909775fc53f9dc225.tar.gz | |
tracing: avoid build warning with HAVE_NOP_MCOUNT
[ 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-01559732716-ext-6629@work.hours
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>
| -rw-r--r-- | kernel/trace/ftrace.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 1688782f3dfb83..90348b34346009 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2952,14 +2952,13 @@ 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++; } |