mrom no kexec main part

        // nkk71: check for kexec support, otherwise use workaround
        if (!multirom_has_kexec())
        {
            //==========================================================================================================================
            // nkk71: workaround for lack of kexec-hb support:
            // flash correct kernel to primary slot,
            // initiate a reboot, and autoboot the ROM
            if (s.is_second_boot == 0)
            {
                char path_bootimg[500];
                char path_boot_mmcblk[500];

                // find kernel mmcblk
                sprintf(path_boot_mmcblk, "/dev/block/platform/msm_sdcc.1/by-name/boot");
                ERROR("nkk71: boot mmcblk=%s\n",path_boot_mmcblk);

                // primary boot.img
                sprintf(path_bootimg, "%s/primary_boot.img", s.roms[0]->base_path);
                ERROR("nkk71: primary_boot.img=%s\n",path_bootimg);

                if (to_boot->type != ROM_DEFAULT)
                {
                    FILE *fp1, *fp2;

                    // check if primary rom boot.img is backed up
                    if (fp1 = fopen(path_bootimg, "r"))
                    {
                        // it's there, compare them maybe it's a new primary boot.img
                        int ch1, ch2;

                        fp2 = fopen(path_boot_mmcblk, "r");

                        ch1 = getc(fp1);
                        ch2 = getc(fp2);

                        while ((ch1 != EOF) && (ch2 != EOF) && (ch1 == ch2))
                        {
                            ch1 = getc(fp1);
                            ch2 = getc(fp2);
                        }
                        fclose(fp1);
                        fclose(fp2);

                        if (ch1 != ch2)
                        {
                            // looks like a new primary boot.img, so back it up (replacing the old one)
                            ERROR("nkk71: backing up NEW primary boot.img; res=%d\n", copy_file(path_boot_mmcblk, path_bootimg));
                        }
                    }
                    else
                    {
                        // it's not there, so backup primary boot.img
                        ERROR("nkk71: backing up primary boot.img; res=%d\n", copy_file(path_boot_mmcblk, path_bootimg));
                    }

                    // now flash the secondary boot.img to primary slot
                    sprintf(path_bootimg, "%s/boot.img", to_boot->base_path);
                    ERROR("nkk71: copy boot.img to primary slot; res=%d\n", copy_file(path_bootimg, path_boot_mmcblk));
                }
                else
                {
                    // restore primay boot.img
                    ERROR("nkk71: restore primary boot.img; res=%d\n", copy_file(path_bootimg, path_boot_mmcblk));
                }
            }
            // nkk71: end of workaround (boot.img flashing), later below, we'll set second_boot true, and ask for a full reboot
            //==========================================================================================================================
        }

        exit = multirom_prepare_for_boot(&s, to_boot);

        // Something went wrong, exit/reboot
        if(exit == -1)
        {
            if(rom_to_boot == NULL)
            {
                multirom_emergency_reboot();
                exit = EXIT_REBOOT;
            }
            else
                exit = EXIT_UMOUNT;
            goto finish;
        }

        s.current_rom = to_boot;

        free(s.curr_rom_part);
        s.curr_rom_part = NULL;

        if(to_boot->partition)
            s.curr_rom_part = strdup(to_boot->partition->uuid);

        if(s.is_second_boot == 0 && (M(to_boot->type) & MASK_ANDROID) && (exit & EXIT_KEXEC))
        {
            s.is_second_boot = 1;

            // mrom_kexecd=1 param might be lost if kernel does not have kexec patches
            ERROR(SECOND_BOOT_KMESG);
        }
        else

        // nkk71: check for kexec support, otherwise use workaround
        if (!multirom_has_kexec())
        {
            if (s.is_second_boot == 0 && ((M(to_boot->type) & MASK_ANDROID) || (to_boot->type == ROM_DEFAULT)))
            {
                // nkk71: force a full reboot (due to kernel flashing from above), then autoboot the ROM
                s.is_second_boot = 1;
                exit = (EXIT_REBOOT | EXIT_UMOUNT);
                ERROR("nkk71: go for reboot second_boot!\n");
                ERROR(SECOND_BOOT_KMESG); // go for second_boot = 1
            }
        }

        else
            s.is_second_boot = 0;
    }