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author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2020-04-06 20:09:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-07 10:43:42 -0700 |
commit | a44ce5137026493b3bec3768cff92861dbeede5c (patch) | |
tree | e2238afd46ea30510ce95ec9d78386f2f7e77dfa /lib/bch.c | |
parent | aecd42df6d399346fd8e5551dd8878338f214ec1 (diff) | |
download | linux-a44ce5137026493b3bec3768cff92861dbeede5c.tar.gz |
lib/bch.c: 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200211205119.GA21234@embeddedor Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/bch.c')
-rw-r--r-- | lib/bch.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/bch.c b/lib/bch.c index 5db6d3a4c8a6..052d3fb753a0 100644 --- a/lib/bch.c +++ b/lib/bch.c @@ -102,7 +102,7 @@ */ struct gf_poly { unsigned int deg; /* polynomial degree */ - unsigned int c[0]; /* polynomial terms */ + unsigned int c[]; /* polynomial terms */ }; /* given its degree, compute a polynomial size in bytes */ |