From: Wang Wensheng <wangwensheng4@xxxxxxxxxx> commit bcea02b096333dc74af987cb9685a4dbdd820840 upstream. If we can't allocate this size, try something smaller with half of the size. Its order should be decreased by one instead of divided by two. Link: https://lkml.kernel.org/r/20221109094434.84046-3-wangwensheng4@xxxxxxxxxx Cc: <mhiramat@xxxxxxxxxx> Cc: <mark.rutland@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Fixes: a79008755497d ("ftrace: Allocate the mcount record pages as groups") Signed-off-by: Wang Wensheng <wangwensheng4@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/trace/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3017,7 +3017,7 @@ static int ftrace_allocate_records(struc /* if we can't allocate this size, try something smaller */ if (!order) return -ENOMEM; - order >>= 1; + order--; goto again; }
