[linux-yocto] [PATCH] btrfs: Fix build error while LIBCRC32C is module

[He Zhe]

This is for all branches containing v5.3-rc1.

Zhe

On 7/25/19 4:54 PM, zhe.he at windriver.com wrote:
> From: YueHaibing <yuehaibing at huawei.com>
>
> If CONFIG_BTRFS_FS is y and CONFIG_LIBCRC32C is m,
> building fails:
>
>   fs/btrfs/super.o: In function `btrfs_mount_root':
>   super.c:(.text+0xb7f9): undefined reference to `crc32c_impl'
>   fs/btrfs/super.o: In function `init_btrfs_fs':
>   super.c:(.init.text+0x3465): undefined reference to `crc32c_impl'
>   fs/btrfs/extent-tree.o: In function `hash_extent_data_ref':
>   extent-tree.c:(.text+0xe60): undefined reference to `crc32c'
>   extent-tree.c:(.text+0xe78): undefined reference to `crc32c'
>   extent-tree.c:(.text+0xe8b): undefined reference to `crc32c'
>   fs/btrfs/dir-item.o: In function `btrfs_insert_xattr_item':
>   dir-item.c:(.text+0x291): undefined reference to `crc32c'
>   fs/btrfs/dir-item.o: In function `btrfs_insert_dir_item':
>   dir-item.c:(.text+0x429): undefined reference to `crc32c'
>
> Select LIBCRC32C to fix it.
>
> Reported-by: Hulk Robot <hulkci at huawei.com>
> Fixes: d5178578bcd4 ("btrfs: directly call into crypto framework for checksumming")
> Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
> Signed-off-by: YueHaibing <yuehaibing at huawei.com>
> Reviewed-by: David Sterba <dsterba at suse.com>
> Signed-off-by: David Sterba <dsterba at suse.com>
>
> commit 314c4cd6d9e60b9412dcd1b1783a66532f91ea2d upstream
>
> Signed-off-by: He Zhe <zhe.he at windriver.com>
> ---
>  fs/btrfs/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
> index 212b4a8..38651fa 100644
> --- a/fs/btrfs/Kconfig
> +++ b/fs/btrfs/Kconfig
> @@ -4,6 +4,7 @@ config BTRFS_FS
>  	tristate "Btrfs filesystem support"
>  	select CRYPTO
>  	select CRYPTO_CRC32C
> +	select LIBCRC32C
>  	select ZLIB_INFLATE
>  	select ZLIB_DEFLATE
>  	select LZO_COMPRESS