summaryrefslogtreecommitdiff
path: root/drivers/scsi/scsi_priv.h
diff options
context:
space:
mode:
authorBart Van Assche <bvanassche@acm.org>2022-10-15 03:24:14 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-10-18 06:17:09 +0300
commit036abd6140078b4125f60e731f28e15de708f87d (patch)
treeb55cf5595a15d0b08c1bdad551631bcb77b38667 /drivers/scsi/scsi_priv.h
parentecca3f9b16366e601a6748bf31e9fe227812248f (diff)
downloadlinux-036abd6140078b4125f60e731f28e15de708f87d.tar.xz
scsi: core: Introduce a new list for SCSI proc directory entries
Instead of using scsi_host_template members to track the SCSI proc directory entries, track these entries in a list. This changes the time needed for looking up the proc dir pointer from O(1) into O(n). This is considered acceptable since the number of SCSI host adapter types per host is usually small (less than ten). This change has been tested by attaching two USB storage devices to a qemu host: $ grep -aH . /proc/scsi/usb-storage/* /proc/scsi/usb-storage/7: Host scsi7: usb-storage /proc/scsi/usb-storage/7: Vendor: QEMU /proc/scsi/usb-storage/7: Product: QEMU USB HARDDRIVE /proc/scsi/usb-storage/7:Serial Number: 1-0000:00:02.1:00.0-6 /proc/scsi/usb-storage/7: Protocol: Transparent SCSI /proc/scsi/usb-storage/7: Transport: Bulk /proc/scsi/usb-storage/7: Quirks: SANE_SENSE /proc/scsi/usb-storage/8: Host scsi8: usb-storage /proc/scsi/usb-storage/8: Vendor: QEMU /proc/scsi/usb-storage/8: Product: QEMU USB HARDDRIVE /proc/scsi/usb-storage/8:Serial Number: 1-0000:00:02.1:00.0-7 /proc/scsi/usb-storage/8: Protocol: Transparent SCSI /proc/scsi/usb-storage/8: Transport: Bulk /proc/scsi/usb-storage/8: Quirks: SANE_SENSE This commit prepares for constifying most SCSI host templates. Reviewed-by: John Garry <john.garry@huawei.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Mike Christie <michael.christie@oracle.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20221015002418.30955-5-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_priv.h')
-rw-r--r--drivers/scsi/scsi_priv.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 494f48e03e90..96284a0e13fe 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -111,8 +111,8 @@ extern void scsi_evt_thread(struct work_struct *work);
/* scsi_proc.c */
#ifdef CONFIG_SCSI_PROC_FS
-extern int scsi_proc_hostdir_add(struct scsi_host_template *);
-extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
+extern int scsi_proc_hostdir_add(const struct scsi_host_template *);
+extern void scsi_proc_hostdir_rm(const struct scsi_host_template *);
extern void scsi_proc_host_add(struct Scsi_Host *);
extern void scsi_proc_host_rm(struct Scsi_Host *);
extern int scsi_init_procfs(void);