From: Wei Yang <[email protected]> The effect here is to get the number of bits, lets use fls() to do this job.
Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Wei Yang <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]> --- kernel/trace/ftrace.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 123d520b9261..5633d37d8806 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1370,8 +1370,9 @@ static struct ftrace_hash *dup_hash(struct ftrace_hash *src, int size) /* * Make the hash size about 1/2 the # found */ - for (size /= 2; size; size >>= 1) - bits++; + bits = fls(size); + if (bits) + bits--; /* Don't allocate too much */ if (bits > FTRACE_HASH_MAX_BITS) -- 2.28.0
