!782 openEuler supports bcache by default on x86 platforms

Merge Pull Request from: @Tom_zc 
 
Fix issue https://gitee.com/openeuler/kernel/issues/I6N4EP,
And solve the kabi change caused by enabling bcache in x86 platforms.
Related PR: 
        https://gitee.com/openeuler/kernel/pulls/757
        https://gitee.com/openeuler/kernel/pulls/771 
 
Link:https://gitee.com/openeuler/kernel/pulls/782 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com> 
Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com> 
Reviewed-by: Liu Chao <liuchao173@huawei.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

arch/x86/configs/openeuler_defconfig

@@ -2522,7 +2522,10 @@ CONFIG_MD_RAID456=m
 # CONFIG_MD_MULTIPATH is not set
 CONFIG_MD_FAULTY=m
 # CONFIG_MD_CLUSTER is not set
-# CONFIG_BCACHE is not set
+CONFIG_BCACHE=m
+# CONFIG_BCACHE_DEBUG is not set
+# CONFIG_BCACHE_CLOSURES_DEBUG is not set
+# CONFIG_BCACHE_ASYNC_REGISTRATION is not set
 CONFIG_BLK_DEV_DM_BUILTIN=y
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_DEBUG=y
@@ -8031,7 +8034,7 @@ CONFIG_CRC32_SLICEBY8=y
 # CONFIG_CRC32_SLICEBY4 is not set
 # CONFIG_CRC32_SARWATE is not set
 # CONFIG_CRC32_BIT is not set
-# CONFIG_CRC64 is not set
+CONFIG_CRC64=m
 # CONFIG_CRC4 is not set
 CONFIG_CRC7=m
 CONFIG_LIBCRC32C=m

include/linux/sched.h

@@ -1357,7 +1357,7 @@ struct task_struct {
 #ifdef CONFIG_UPROBES
 	struct uprobe_task		*utask;
 #endif
-#if defined(CONFIG_BCACHE) || defined(CONFIG_BCACHE_MODULE)
+#if (defined(CONFIG_BCACHE) || defined(CONFIG_BCACHE_MODULE)) && !defined(CONFIG_X86)
 	unsigned int			sequential_io;
 	unsigned int			sequential_io_avg;
 #endif
@@ -1435,8 +1435,13 @@ struct task_struct {
 	KABI_RESERVE(8)
 	KABI_RESERVE(9)
 #endif
+#if (defined(CONFIG_BCACHE) || defined(CONFIG_BCACHE_MODULE)) && defined(CONFIG_X86)
+	KABI_USE(10, unsigned int sequential_io)
+	KABI_USE(11, unsigned int sequential_io_avg)
+#else
 	KABI_RESERVE(10)
 	KABI_RESERVE(11)
+#endif
 	KABI_RESERVE(12)
 	KABI_RESERVE(13)
 	KABI_RESERVE(14)