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| author | Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com> | 2021-07-27 08:25:13 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-08-02 13:37:28 -0600 |
| commit | 26e2d7a362f6a83146ea3eaa8f17ca9ce35388d3 (patch) | |
| tree | 380b052babf56ed3419e5d6c9d7f7af4871961c2 | |
| parent | 2f4731dcd0bb73379fbb9e3eb07ae7324125caef (diff) | |
| download | linux-26e2d7a362f6a83146ea3eaa8f17ca9ce35388d3.tar.bz2 | |
block: reduce stack usage in diskstats_show
I have compiled the kernel with a cross compiler "hppa-linux-gnu-" v9.3.0
on x86-64 host machine. I got the following warning:
block/genhd.c: In function ‘diskstats_show’:
block/genhd.c:1227:1: warning: the frame size of 1688 bytes is larger
than 1280 bytes [-Wframe-larger-than=]
1227 | }
By Reduced the stack footprint by using the %pg printk specifier instead
of disk_name to remove the need for the on-stack buffer.
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210727062518.122108-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/genhd.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/block/genhd.c b/block/genhd.c index 5dbb99b57b33..cf705cf95440 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1111,7 +1111,6 @@ static int diskstats_show(struct seq_file *seqf, void *v) { struct gendisk *gp = v; struct block_device *hd; - char buf[BDEVNAME_SIZE]; unsigned int inflight; struct disk_stats stat; unsigned long idx; @@ -1134,15 +1133,14 @@ static int diskstats_show(struct seq_file *seqf, void *v) else inflight = part_in_flight(hd); - seq_printf(seqf, "%4d %7d %s " + seq_printf(seqf, "%4d %7d %pg " "%lu %lu %lu %u " "%lu %lu %lu %u " "%u %u %u " "%lu %lu %lu %u " "%lu %u" "\n", - MAJOR(hd->bd_dev), MINOR(hd->bd_dev), - disk_name(gp, hd->bd_partno, buf), + MAJOR(hd->bd_dev), MINOR(hd->bd_dev), hd, stat.ios[STAT_READ], stat.merges[STAT_READ], stat.sectors[STAT_READ], |