From c1bc5919f6741cc4b0c83e3058b3d65d76c943e3 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (VMware)" Date: Wed, 29 Mar 2017 11:38:13 -0400 Subject: [PATCH] ftrace: Clean up __seq_open_private() return check The return status check of __seq_open_private() is rather strange: iter = __seq_open_private(); if (iter) { /* do stuff */ } return iter ? 0 : -ENOMEM; It makes much more sense to do the return of failure right away: iter = __seq_open_private(); if (!iter) return -ENOMEM; /* do stuff */ return 0; This clean up will make updates to this code a bit nicer. Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ftrace.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 0556a202c055..527c4d3e8d7f 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3355,12 +3355,13 @@ ftrace_avail_open(struct inode *inode, struct file *file) return -ENODEV; iter = __seq_open_private(file, &show_ftrace_seq_ops, sizeof(*iter)); - if (iter) { - iter->pg = ftrace_pages_start; - iter->ops = &global_ops; - } + if (!iter) + return -ENOMEM; - return iter ? 0 : -ENOMEM; + iter->pg = ftrace_pages_start; + iter->ops = &global_ops; + + return 0; } static int @@ -3369,13 +3370,14 @@ ftrace_enabled_open(struct inode *inode, struct file *file) struct ftrace_iterator *iter; iter = __seq_open_private(file, &show_ftrace_seq_ops, sizeof(*iter)); - if (iter) { - iter->pg = ftrace_pages_start; - iter->flags = FTRACE_ITER_ENABLED; - iter->ops = &global_ops; - } + if (!iter) + return -ENOMEM; - return iter ? 0 : -ENOMEM; + iter->pg = ftrace_pages_start; + iter->flags = FTRACE_ITER_ENABLED; + iter->ops = &global_ops; + + return 0; } /** -- 2.20.1