linux-kernel - [PATCH 27/42] drm/selftests/test-drm_mm: Mark 'hole_end' as always

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201116174112.1833368-28-lee.jones@linaro.org>
Date:   Mon, 16 Nov 2020 17:40:57 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Christian König <christian.koenig@....com>,
        Nirmoy Das <nirmoy.aiemd@...il.com>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 27/42] drm/selftests/test-drm_mm: Mark 'hole_end' as always_unused

In the macro drm_mm_for_each_hole() 'hole_end' is provided as a
container for 'hole_start + pos->hole_size', but is not utilised in
this use-case.  We cannot simply delete the variable, so here we tell
the compiler that we're intentionally discarding the read value.

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/selftests/test-drm_mm.c: In function ‘assert_no_holes’:
 drivers/gpu/drm/selftests/test-drm_mm.c:57:18: warning: variable ‘hole_end’ set but not used [-Wunused-but-set-variable]

Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: "Christian König" <christian.koenig@....com>
Cc: Nirmoy Das <nirmoy.aiemd@...il.com>
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/gpu/drm/selftests/test-drm_mm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 95e212a9a74d2..b768b53c4aee3 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -54,7 +54,7 @@ static int igt_sanitycheck(void *ignored)
 static bool assert_no_holes(const struct drm_mm *mm)
 {
 	struct drm_mm_node *hole;
-	u64 hole_start, hole_end;
+	u64 hole_start, __always_unused hole_end;
 	unsigned long count;
 
 	count = 0;
-- 
2.25.1