Hi, Bart
> > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> > index 618b253e5ec8..df30622a2b67 100644
> > --- a/drivers/scsi/ufs/ufshcd.h
> > +++ b/drivers/scsi/ufs/ufshcd.h
> > @@ -588,6 +588,24 @@ struct ufs_hba_variant_params {
> > u16 hba_enable_delay_us;
> > u32 wb_flush_threshold;
> > };
> > +#ifdef CONFIG_SCSI_UFS_HPB
> > +/**
> > + * struct ufshpb_dev_info - UFSHPB device related info
> > + * @num_lu: the number of user logical unit to check whether all lu finished
> > + * initialization
> > + * @rgn_size: device reported HPB region size
> > + * @srgn_size: device reported HPB sub-region size
> > + * @slave_conf_cnt: counter to check all lu finished initialization
> > + * @hpb_disabled: flag to check if HPB is disabled
> > + */
> > +struct ufshpb_dev_info {
> > + int num_lu;
> > + int rgn_size;
> > + int srgn_size;
> > + atomic_t slave_conf_cnt;
> > + bool hpb_disabled;
> > +};
> > +#endif
>
> Please insert a blank line above "#ifdef CONFIG_SCSI_UFS_HPB"
OK, I will insert a blank line.
> > +/* HPB enabled lu list */
> > +static LIST_HEAD(lh_hpb_lu);
>
> Is it necessary to maintain this list? Or in other words, is it possible to
> change all list_for_each_entry(hpb, &lh_hpb_lu, list_hpb_lu) calls into
> shost_for_each_device() calls?
OK, I will remove lh_hpb_lu.
> > +/* SYSFS functions */
> > +#define ufshpb_sysfs_attr_show_func(__name) \
> > +static ssize_t __name##_show(struct device *dev, \
> > + struct device_attribute *attr, char *buf) \
> > +{ \
> > + struct scsi_device *sdev = to_scsi_device(dev); \
> > + struct ufshpb_lu *hpb = sdev->hostdata; \
> > + if (!hpb) \
> > + return -ENOENT; \
> > + return snprintf(buf, PAGE_SIZE, "%d\n", \
> > + atomic_read(&hpb->stats.__name)); \
> > +} \
> > +static DEVICE_ATTR_RO(__name)
>
> Please leave a blank line after declarations (between the "hpb" declaration
> and "if (!hpb)").
OK, I will add a blank line.
> > +#ifndef CONFIG_SCSI_UFS_HPB
> > +[...]
> > +static struct attribute *hpb_dev_attrs[] = { NULL,};
> > +static struct attribute_group ufs_sysfs_hpb_stat_group = {.attrs = hpb_dev_attrs,};
> > +#else
> > +[...]
> > +extern struct attribute_group ufs_sysfs_hpb_stat_group;
> > +#endif
>
> Defining static variables or arrays in header files is questionable because
> the definition of these variables will be duplicated in each source file that
> header file is included in. Although the general rule for kernel code is to
> confine #ifdefs to header files, for ufs_sysfs_hpb_stat_group I think that
> it is better to surround its use with #ifndef CONFIG_SCSI_UFS_HPB / #endif
> instead of defining a dummy structure as static variable in a header file if
> HPB support is disabled.
OK, I added #ifdef in ufshcd.c.
static const struct attribute_group *ufshcd_driver_groups[] = {
&ufs_sysfs_unit_descriptor_group,
&ufs_sysfs_lun_attributes_group,
#ifdef CONFIG_SCSI_UFS_HPB
&ufs_sysfs_hpb_stat_group,
#endif
NULL,
};
Thanks,
Daejun
