Warning: objtool: fault_in_readable()+0x94

[gatlinnewhouse]

mm/gup.o: warning: objtool: fault_in_readable()+0x94: call to __get_user_nocheck_1() with UACCESS enabled

[gatlinnewhouse]

no df cache function is expanding to something wrong, since disabling safefetch does not show this warning.

possibly related lore threads:
https://lore.kernel.org/lkml/CAHk-=wigHm2J4LkUL1=y_H8zGwM0JsK2CrWyLNbz9fvXfbaBQA@mail.gmail.com/

[gatlinnewhouse]

This error persisted into later compile versions as well.

[gatlinnewhouse]

More(?) found when compiling with gcc12:

    vmlinux.o: warning: objtool: __fixup_pi_state_owner+0x95: call to __get_user_nocheck_4() with UACCESS enabled
    vmlinux.o: warning: objtool: futex_lock_pi_atomic+0x6a: call to __get_user_nocheck_4() with UACCESS enabled
    vmlinux.o: warning: objtool: futex_requeue+0x203: call to __get_user_nocheck_4() with UACCESS enabled
    vmlinux.o: warning: objtool: futex_wait_multiple_setup+0x12a: call to __get_user_nocheck_4() with UACCESS enabled
    vmlinux.o: warning: objtool: futex_wait_setup+0x82: call to __get_user_nocheck_4() with UACCESS enabled
    vmlinux.o: warning: objtool: fault_in_readable+0xc5: call to __get_user_nocheck_1() with UACCESS enabled
    vmlinux.o: warning: objtool: do_syscall_64+0x17f: call to df_debug_syscall_entry() leaves .noinstr.text section