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authorVinícius Tinti <viniciustinti@gmail.com>2014-04-05 01:21:24 +0400
committerBehan Webster <behanw@converseincode.com>2014-10-14 12:51:22 +0400
commit0458a953d85088a9ba3e448745676377775879e0 (patch)
treec73eb37def38237f25aba8347443237f25941725 /fs/btrfs/hash.c
parenta0a77af14117e388d43b2385d5ecc800e2d6eee9 (diff)
downloadlinux-0458a953d85088a9ba3e448745676377775879e0.tar.xz
btrfs: LLVMLinux: Remove VLAIS
Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99 compliant equivalent. This patch instead allocates the appropriate amount of memory using a char array using the SHASH_DESC_ON_STACK macro. The new code can be compiled with both gcc and clang. Signed-off-by: Vinícius Tinti <viniciustinti@gmail.com> Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de> Reviewed-by: Mark Charlebois <charlebm@gmail.com> Signed-off-by: Behan Webster <behanw@converseincode.com> Acked-by: Chris Mason <clm@fb.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net>
Diffstat (limited to 'fs/btrfs/hash.c')
-rw-r--r--fs/btrfs/hash.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c
index 64f15bb30a81..aae520b2aee5 100644
--- a/fs/btrfs/hash.c
+++ b/fs/btrfs/hash.c
@@ -31,18 +31,16 @@ void btrfs_hash_exit(void)
u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length)
{
- struct {
- struct shash_desc shash;
- char ctx[crypto_shash_descsize(tfm)];
- } desc;
+ SHASH_DESC_ON_STACK(shash, tfm);
+ u32 *ctx = (u32 *)shash_desc_ctx(shash);
int err;
- desc.shash.tfm = tfm;
- desc.shash.flags = 0;
- *(u32 *)desc.ctx = crc;
+ shash->tfm = tfm;
+ shash->flags = 0;
+ *ctx = crc;
- err = crypto_shash_update(&desc.shash, address, length);
+ err = crypto_shash_update(shash, address, length);
BUG_ON(err);
- return *(u32 *)desc.ctx;
+ return *ctx;
}