field '' with variable sized type 'union jset::(anonymous at ./usr/include/linux/bcache.h:286:2)' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]

field '' with variable sized type 'union jset::(anonymous at ./usr/include/linux/bcache.h:287:2)' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]

objtool: kasan_report()+0x56: call to __stack_chk_fail() with UACCESS enabled

objtool: .entry.text+0x1e1: stack state mismatch: cfa1=7+56 cfa2=7+40

objtool: ia32_setup_rt_frame()+0x1e8: call to memset() with UACCESS enabled

objtool: do_signal()+0x762: call to memset() with UACCESS enabled

objtool: __vmx_vcpu_run()+0x12a: return with modified stack frame

cannot find entry symbol _start; not setting start address

use of bitwise '|' with boolean operands [-Wbitwise-instead-of-logical]