scsi: use %*pb[l] to print bitmaps including cpumasks and nodemasks

printk and friends can now format bitmaps using '%*pb[l]'.  cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.

* map_show()'s return value is too high by one and the function could
  modify beyond the end of the buffer when the formatted text is long
  enough.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 1132321..1f8e2dc 100644 (file)
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -4658,10 +4658,10 @@ static ssize_t map_show(struct device_driver *ddp, char *buf)
                return scnprintf(buf, PAGE_SIZE, "0-%u\n",
                                 sdebug_store_sectors);
 
-       count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
-
+       count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
+                         (int)map_size, map_storep);
        buf[count++] = '\n';
-       buf[count++] = 0;
+       buf[count] = '\0';
 
        return count;
 }