diff options
| author | Marcin Nowakowski <marcin.nowakowski@imgtec.com> | 2017-07-06 15:35:31 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-07-31 13:37:54 -0400 |
| commit | 9052d52e8bce71fd5cfd78f79b26f90831dbd7ba (patch) | |
| tree | 6a3509d3549f4385eb00531127f15b03a86bc866 /kernel | |
| parent | 4bae4fd1593bd212d9e6c3e27dda306da197eff7 (diff) | |
kernel/extable.c: mark core_kernel_text notrace
[ Upstream commit c0d80ddab89916273cb97114889d3f337bc370ae ]
core_kernel_text is used by MIPS in its function graph trace processing,
so having this method traced leads to an infinite set of recursive calls
such as:
Call Trace:
ftrace_return_to_handler+0x50/0x128
core_kernel_text+0x10/0x1b8
prepare_ftrace_return+0x6c/0x114
ftrace_graph_caller+0x20/0x44
return_to_handler+0x10/0x30
return_to_handler+0x0/0x30
return_to_handler+0x0/0x30
ftrace_ops_no_ops+0x114/0x1bc
core_kernel_text+0x10/0x1b8
core_kernel_text+0x10/0x1b8
core_kernel_text+0x10/0x1b8
ftrace_ops_no_ops+0x114/0x1bc
core_kernel_text+0x10/0x1b8
prepare_ftrace_return+0x6c/0x114
ftrace_graph_caller+0x20/0x44
(...)
Mark the function notrace to avoid it being traced.
Link: http://lkml.kernel.org/r/1498028607-6765-1-git-send-email-marcin.nowakowski@imgtec.com
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Meyer <thomas@m3y3r.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/extable.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/extable.c b/kernel/extable.c index c98f926277a8..818019777503 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -67,7 +67,7 @@ static inline int init_kernel_text(unsigned long addr) return 0; } -int core_kernel_text(unsigned long addr) +int notrace core_kernel_text(unsigned long addr) { if (addr >= (unsigned long)_stext && addr < (unsigned long)_etext) |