[merged mm-stable] zram-remove-valid_io_request.patch removed from -mm tree

[merged mm-stable] zram-remove-valid_io_request.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: zram: remove valid_io_request
has been removed from the -mm tree.  Its filename was
     zram-remove-valid_io_request.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: zram: remove valid_io_request
Date: Tue, 11 Apr 2023 19:14:44 +0200

All bios hande to drivers from the block layer are checked against the
device size and for logical block alignment already (and have been since
long before zram was merged), so don't duplicate those checks.

Link: https://lkml.kernel.org/r/20230411171459.567614-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/block/zram/zram_drv.c |   34 --------------------------------
 drivers/block/zram/zram_drv.h |    1 
 2 files changed, 1 insertion(+), 34 deletions(-)

--- a/drivers/block/zram/zram_drv.c~zram-remove-valid_io_request
+++ a/drivers/block/zram/zram_drv.c
@@ -175,30 +175,6 @@ static inline u32 zram_get_priority(stru
 	return prio & ZRAM_COMP_PRIORITY_MASK;
 }
 
-/*
- * Check if request is within bounds and aligned on zram logical blocks.
- */
-static inline bool valid_io_request(struct zram *zram,
-		sector_t start, unsigned int size)
-{
-	u64 end, bound;
-
-	/* unaligned request */
-	if (unlikely(start & (ZRAM_SECTOR_PER_LOGICAL_BLOCK - 1)))
-		return false;
-	if (unlikely(size & (ZRAM_LOGICAL_BLOCK_SIZE - 1)))
-		return false;
-
-	end = start + (size >> SECTOR_SHIFT);
-	bound = zram->disksize >> SECTOR_SHIFT;
-	/* out of range */
-	if (unlikely(start >= bound || end > bound || start > end))
-		return false;
-
-	/* I/O request is valid */
-	return true;
-}
-
 static void update_position(u32 *index, int *offset, struct bio_vec *bvec)
 {
 	*index  += (*offset + bvec->bv_len) / PAGE_SIZE;
@@ -1184,10 +1160,9 @@ static ssize_t io_stat_show(struct devic
 
 	down_read(&zram->init_lock);
 	ret = scnprintf(buf, PAGE_SIZE,
-			"%8llu %8llu %8llu %8llu\n",
+			"%8llu %8llu 0 %8llu\n",
 			(u64)atomic64_read(&zram->stats.failed_reads),
 			(u64)atomic64_read(&zram->stats.failed_writes),
-			(u64)atomic64_read(&zram->stats.invalid_io),
 			(u64)atomic64_read(&zram->stats.notify_free));
 	up_read(&zram->init_lock);
 
@@ -2037,13 +2012,6 @@ static void zram_submit_bio(struct bio *
 {
 	struct zram *zram = bio->bi_bdev->bd_disk->private_data;
 
-	if (!valid_io_request(zram, bio->bi_iter.bi_sector,
-					bio->bi_iter.bi_size)) {
-		atomic64_inc(&zram->stats.invalid_io);
-		bio_io_error(bio);
-		return;
-	}
-
 	__zram_make_request(zram, bio);
 }
 
--- a/drivers/block/zram/zram_drv.h~zram-remove-valid_io_request
+++ a/drivers/block/zram/zram_drv.h
@@ -78,7 +78,6 @@ struct zram_stats {
 	atomic64_t compr_data_size;	/* compressed size of pages stored */
 	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 */
 	atomic64_t notify_free;	/* no. of swap slot free notifications */
 	atomic64_t same_pages;		/* no. of same element filled pages */
 	atomic64_t huge_pages;		/* no. of huge pages */
_

Patches currently in -mm which might be from hch@lst.de are

zram-make-zram_bio_discard-more-self-contained.patch
zram-simplify-bvec-iteration-in-__zram_make_request.patch
zram-move-discard-handling-to-zram_submit_bio.patch
zram-return-early-on-error-in-zram_bvec_rw.patch
zram-refactor-highlevel-read-and-write-handling.patch
zram-dont-use-highmem-for-the-bounce-buffer-in-zram_bvec_readwrite.patch
zram-rename-__zram_bvec_read-to-zram_read_page.patch
zram-directly-call-zram_read_page-in-writeback_store.patch
zram-refactor-zram_bdev_read.patch
zram-dont-pass-a-bvec-to-__zram_bvec_write.patch
zram-refactor-zram_bdev_write.patch
zram-pass-a-page-to-read_from_bdev.patch
zram-dont-return-errors-from-read_from_bdev_async.patch
zram-fix-synchronous-reads.patch
zram-return-errors-from-read_from_bdev_sync.patch