linux-kernel - [PATCH] mm: cma: Return cma->name directly in cma_get

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Date:   Mon, 22 Jun 2020 18:58:40 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Barry Song <song.bao.hua@...ilicon.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] mm: cma: Return cma->name directly in cma_get_name

clang warns:

mm/cma.c:55:14: warning: address of array 'cma->name' will always
evaluate to 'true' [-Wpointer-bool-conversion]
        return cma->name ? cma->name : "(undefined)";
               ~~~~~^~~~ ~
1 warning generated.

After commit e7f0557d7de9 ("mm: cma: fix the name of CMA areas"),
cma->name will be an array with some value worth printing so we do not
need to check for NULL.

Link: https://github.com/ClangBuiltLinux/linux/issues/1063
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 mm/cma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/cma.c b/mm/cma.c
index 31a61d410c59..6cf08817bac6 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -52,7 +52,7 @@ unsigned long cma_get_size(const struct cma *cma)
 
 const char *cma_get_name(const struct cma *cma)
 {
-	return cma->name ? cma->name : "(undefined)";
+	return cma->name;
 }
 
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,

base-commit: 27f11fea33608cbd321a97cbecfa2ef97dcc1821
-- 
2.27.0