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Subject[PATCH] genhd: remove useless cast in diskstats_show()

This patch removes the (unsigned long long) cast in
diskstats_show() and adjusts the seq_printf() format
string to 'unsigned long'

diskstats_show() uses part_stat_read() to get the
stats, which either accesses the specified field in
the struct disk_stats directly (non SMP) or sums
up the per CPU values in a variable of the same
type as the field, so in any case the result will
have the same type and range as the specified field
which for all disk_stats entries is unsigned long

also, for unsigned long ranges the output of %lu
should be identical to the one of %llu, so no cange
in teh actual proc entry contents


Signed-off-by: Herbert Poetzl <>
--- linux/block/genhd.c 2011-03-07 16:53:26.000000000 +0100
+++ linux/block/genhd.c 2011-04-14 03:36:35.000000000 +0200
@@ -1154,17 +1154,17 @@ static int diskstats_show(struct seq_fil
cpu = part_stat_lock();
part_round_stats(cpu, hd);
- seq_printf(seqf, "%4d %7d %s %lu %lu %llu "
- "%u %lu %lu %llu %u %u %u %u\n",
+ seq_printf(seqf, "%4d %7d %s %lu %lu %lu "
+ "%u %lu %lu %lu %u %u %u %u\n",
MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
disk_name(gp, hd->partno, buf),
part_stat_read(hd, ios[0]),
part_stat_read(hd, merges[0]),
- (unsigned long long)part_stat_read(hd, sectors[0]),
+ part_stat_read(hd, sectors[0]),
jiffies_to_msecs(part_stat_read(hd, ticks[0])),
part_stat_read(hd, ios[1]),
part_stat_read(hd, merges[1]),
- (unsigned long long)part_stat_read(hd, sectors[1]),
+ part_stat_read(hd, sectors[1]),
jiffies_to_msecs(part_stat_read(hd, ticks[1])),
jiffies_to_msecs(part_stat_read(hd, io_ticks)),

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