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authorGustavo A. R. Silva <gustavo@embeddedor.com>2020-02-11 13:39:10 -0600
committerTakashi Iwai <tiwai@suse.de>2020-02-12 08:14:43 +0100
commit9478bd43a2eb5c72b599368513d10880b296d65f (patch)
treee6139e2e097d0fa40a6dc486f0ef991a52e31bfc /sound/core/oss
parent0e023687ca552147a76540377be4c642b1313d53 (diff)
downloadlinux-9478bd43a2eb5c72b599368513d10880b296d65f.tar.bz2
ALSA: core: Replace zero-length array with flexible-array member
The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertenly introduced[3] to the codebase from now on. This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Link: https://lore.kernel.org/r/20200211193910.GA4596@embeddedor Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/oss')
-rw-r--r--sound/core/oss/rate.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 7cd09cef6961..d381f4c967c9 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -47,7 +47,7 @@ struct rate_priv {
unsigned int pos;
rate_f func;
snd_pcm_sframes_t old_src_frames, old_dst_frames;
- struct rate_channel channels[0];
+ struct rate_channel channels[];
};
static void rate_init(struct snd_pcm_plugin *plugin)