X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=fs%2Fbtrfs%2Fhash.c;h=aae520b2aee535f069946ba332b83a3ab0d44644;hb=a9b70711896043d5913c6cf10785dc7d13aed27d;hp=64f15bb30a81dbf9ada217d4e0c09cd74fddb197;hpb=2fd7476de999124bbf6830aa59ac092c882280fe;p=cascardo%2Flinux.git

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;
 }