zram: remove unused stats fields

We don't show num_reads and num_writes since we removed corresponding
sysfs nodes in 2017.  Block layer stats are exposed via
/sys/block/zramX/stat file.

However, we still increment those atomic vars and store them in zram
stats.  Remove leftovers.

Link: https://lkml.kernel.org/r/20221117141326.1105181-1-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 9d33801..e290d6d 100644 (file)
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1981,11 +1981,9 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
        int ret;
 
        if (!op_is_write(op)) {
-               atomic64_inc(&zram->stats.num_reads);
                ret = zram_bvec_read(zram, bvec, index, offset, bio);
                flush_dcache_page(bvec->bv_page);
        } else {
-               atomic64_inc(&zram->stats.num_writes);
                ret = zram_bvec_write(zram, bvec, index, offset, bio);
        }
 

diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index 4733254..c525462 100644 (file)
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -76,8 +76,6 @@ struct zram_table_entry {
 
 struct zram_stats {
        atomic64_t compr_data_size;     /* compressed size of pages stored */
-       atomic64_t num_reads;   /* failed + successful */
-       atomic64_t num_writes;  /* --do-- */
        atomic64_t failed_reads;        /* can happen when memory is too low */
        atomic64_t failed_writes;       /* can happen when memory is too low */
        atomic64_t invalid_io;  /* non-page-aligned I/O requests */