[PATCH 3/7] kernel-trace: Adjust two checks for null pointers in compatible_field()

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Fri, 5 May 2017 20:00:11 +0200
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The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code place.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 kernel/trace/trace_events_hist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index df566e21344d..36412deac24c 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1324,7 +1324,7 @@ static bool compatible_field(struct ftrace_event_field 
*field,
 {
        if (field == test_field)
                return true;
-       if (field == NULL || test_field == NULL)
+       if (!field || !test_field)
                return false;
        if (strcmp(field->name, test_field->name) != 0)
                return false;
-- 
2.12.2