powerpc/nvram: Ensure that the partition header/block size is right

Use BUILD_BUG_ON to ensure the structure representing a partition
header have the right size.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index a5a5587121a7..f7538820c03d 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -565,6 +565,8 @@ static int __init nvram_init(void)
         int error;
         int rc;
         
+        BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
+
         if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
                 return  -ENODEV;