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Subject[PATCH] block: Removed a warning while compiling with a cross compiler for parisc
Date
I have compiled the kernel with a cross compiler "hppa-linux-gnu-" on
x86-64 host machine. I got the follwing 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 | }

The problem was calling seq_printf function with too long argumnets list.
Therefore, I cut it into two halves. For the second half I have defined
a function called "print_disk_stats" to print the states of the disk.

Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
---
block/genhd.c | 75 ++++++++++++++++++++++++++++-----------------------
1 file changed, 41 insertions(+), 34 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 9f8cb7beaad1..caf5ac8b509f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1151,6 +1151,44 @@ const struct device_type disk_type = {
};

#ifdef CONFIG_PROC_FS
+
+void print_disk_stats(struct seq_file *seqf,
+ unsigned int inflight, struct disk_stats *stat)
+{
+ seq_printf(seqf, "%lu %lu %lu %u "
+ "%lu %lu %lu %u "
+ "%u %u %u "
+ "%lu %lu %lu %u "
+ "%lu %u"
+ "\n",
+ stat->ios[STAT_READ],
+ stat->merges[STAT_READ],
+ stat->sectors[STAT_READ],
+ (unsigned int)div_u64(stat->nsecs[STAT_READ],
+ NSEC_PER_MSEC),
+ stat->ios[STAT_WRITE],
+ stat->merges[STAT_WRITE],
+ stat->sectors[STAT_WRITE],
+ (unsigned int)div_u64(stat->nsecs[STAT_WRITE],
+ NSEC_PER_MSEC),
+ inflight,
+ jiffies_to_msecs(stat->io_ticks),
+ (unsigned int)div_u64(stat->nsecs[STAT_READ] +
+ stat->nsecs[STAT_WRITE] +
+ stat->nsecs[STAT_DISCARD] +
+ stat->nsecs[STAT_FLUSH],
+ NSEC_PER_MSEC),
+ stat->ios[STAT_DISCARD],
+ stat->merges[STAT_DISCARD],
+ stat->sectors[STAT_DISCARD],
+ (unsigned int)div_u64(stat->nsecs[STAT_DISCARD],
+ NSEC_PER_MSEC),
+ stat->ios[STAT_FLUSH],
+ (unsigned int)div_u64(stat->nsecs[STAT_FLUSH],
+ NSEC_PER_MSEC)
+ );
+}
+
/*
* aggregate disk stat collector. Uses the same stats that the sysfs
* entries do, above, but makes them available through one seq_file.
@@ -1185,41 +1223,10 @@ static int diskstats_show(struct seq_file *seqf, void *v)
else
inflight = part_in_flight(hd);

- seq_printf(seqf, "%4d %7d %s "
- "%lu %lu %lu %u "
- "%lu %lu %lu %u "
- "%u %u %u "
- "%lu %lu %lu %u "
- "%lu %u"
- "\n",
+ seq_printf(seqf, "%4d %7d %s ",
MAJOR(hd->bd_dev), MINOR(hd->bd_dev),
- disk_name(gp, hd->bd_partno, buf),
- stat.ios[STAT_READ],
- stat.merges[STAT_READ],
- stat.sectors[STAT_READ],
- (unsigned int)div_u64(stat.nsecs[STAT_READ],
- NSEC_PER_MSEC),
- stat.ios[STAT_WRITE],
- stat.merges[STAT_WRITE],
- stat.sectors[STAT_WRITE],
- (unsigned int)div_u64(stat.nsecs[STAT_WRITE],
- NSEC_PER_MSEC),
- inflight,
- jiffies_to_msecs(stat.io_ticks),
- (unsigned int)div_u64(stat.nsecs[STAT_READ] +
- stat.nsecs[STAT_WRITE] +
- stat.nsecs[STAT_DISCARD] +
- stat.nsecs[STAT_FLUSH],
- NSEC_PER_MSEC),
- stat.ios[STAT_DISCARD],
- stat.merges[STAT_DISCARD],
- stat.sectors[STAT_DISCARD],
- (unsigned int)div_u64(stat.nsecs[STAT_DISCARD],
- NSEC_PER_MSEC),
- stat.ios[STAT_FLUSH],
- (unsigned int)div_u64(stat.nsecs[STAT_FLUSH],
- NSEC_PER_MSEC)
- );
+ disk_name(gp, hd->bd_partno, buf));
+ print_disk_stats(seqf, inflight, &stat);
}
rcu_read_unlock();

--
2.29.0.rc1.dirty
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