crypto: Work around deallocated stack frame reference gcc bug on sparc.

[platform/kernel/linux-rpi.git] / lib / libcrc32c.c

diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c
index 74a54b7..9f79547 100644 (file)
--- a/lib/libcrc32c.c
+++ b/lib/libcrc32c.c
@@ -43,7 +43,7 @@ static struct crypto_shash *tfm;
 u32 crc32c(u32 crc, const void *address, unsigned int length)
 {
        SHASH_DESC_ON_STACK(shash, tfm);
-       u32 *ctx = (u32 *)shash_desc_ctx(shash);
+       u32 ret, *ctx = (u32 *)shash_desc_ctx(shash);
        int err;
 
        shash->tfm = tfm;
@@ -53,7 +53,9 @@ u32 crc32c(u32 crc, const void *address, unsigned int length)
        err = crypto_shash_update(shash, address, length);
        BUG_ON(err);
 
-       return *ctx;
+       ret = *ctx;
+       barrier_data(ctx);
+       return ret;
 }
 
 EXPORT_SYMBOL(crc32c);