linux-kernel - [PATCH] checkpatch: Don't warn about returning EPOLL* defines

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Message-Id: <1575395876-12526-1-git-send-email-benjamin.h.shelton@intel.com>
Date:   Tue,  3 Dec 2019 11:57:56 -0600
From:   Ben Shelton <benjamin.h.shelton@...el.com>
To:     linux-kernel@...r.kernel.org
Cc:     Ben Shelton <benjamin.h.shelton@...el.com>,
        Andy Whitcroft <apw@...onical.com>,
        Joe Perches <joe@...ches.com>
Subject: [PATCH] checkpatch: Don't warn about returning EPOLL* defines

The EPOLL* defines are bit definitions, not errno values, so they should
be returned as-is, not as negative values.

Signed-off-by: Ben Shelton <benjamin.h.shelton@...el.com>
Cc: Andy Whitcroft <apw@...onical.com>
Cc: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 592911a..caad932 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4867,7 +4867,7 @@ sub process {
 		}
 
 # Return of what appears to be an errno should normally be negative
-		if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
+		if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E(?!POLL)[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
 			my $name = $1;
 			if ($name ne 'EOF' && $name ne 'ERROR') {
 				WARN("USE_NEGATIVE_ERRNO",
-- 
2.6.4