The patch titled
Subject: drivers/nvdimm/pmem.c: remove pmem_rw_page()
has been added to the -mm tree. Its filename is
pmem-remove-pmem_rw_page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/pmem-remove-pmem_rw_page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/pmem-remove-pmem_rw_page.patch
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------------------------------------------------------
From: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Subject: drivers/nvdimm/pmem.c: remove pmem_rw_page()
The rw_page() interface doesn't provide a clear performance benefit for
PMEM and has had a nonzero maintenance burden, so remove it.
Link: http://lkml.kernel.org/r/20170728165604.10455-3-ross.zwisler@xxxxxxxxxxxxxxx
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Suggested-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: "karam . lee" <karam.lee@xxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Jerome Marchand <jmarchan@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Seungho Park <seungho1.park@xxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/nvdimm/pmem.c | 22 ----------------------
1 file changed, 22 deletions(-)
diff -puN drivers/nvdimm/pmem.c~pmem-remove-pmem_rw_page drivers/nvdimm/pmem.c
--- a/drivers/nvdimm/pmem.c~pmem-remove-pmem_rw_page
+++ a/drivers/nvdimm/pmem.c
@@ -200,27 +200,6 @@ static blk_qc_t pmem_make_request(struct
return BLK_QC_T_NONE;
}
-static int pmem_rw_page(struct block_device *bdev, sector_t sector,
- struct page *page, bool is_write)
-{
- struct pmem_device *pmem = bdev->bd_queue->queuedata;
- blk_status_t rc;
-
- rc = pmem_do_bvec(pmem, page, hpage_nr_pages(page) * PAGE_SIZE,
- 0, is_write, sector);
-
- /*
- * The ->rw_page interface is subtle and tricky. The core
- * retries on any error, so we can only invoke page_endio() in
- * the successful completion case. Otherwise, we'll see crashes
- * caused by double completion.
- */
- if (rc == 0)
- page_endio(page, is_write, 0);
-
- return blk_status_to_errno(rc);
-}
-
/* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */
__weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
long nr_pages, void **kaddr, pfn_t *pfn)
@@ -244,7 +223,6 @@ __weak long __pmem_direct_access(struct
static const struct block_device_operations pmem_fops = {
.owner = THIS_MODULE,
- .rw_page = pmem_rw_page,
.revalidate_disk = nvdimm_revalidate_disk,
};
_
Patches currently in -mm which might be from ross.zwisler@xxxxxxxxxxxxxxx are
mm-add-vm_insert_mixed_mkwrite.patch
dax-relocate-some-dax-functions.patch
dax-use-common-4k-zero-page-for-dax-mmap-reads.patch
dax-remove-dax-code-from-page_cache_tree_insert.patch
dax-move-all-dax-radix-tree-defs-to-fs-daxc.patch
btt-remove-btt_rw_page.patch
pmem-remove-pmem_rw_page.patch
brd-remove-brd_rw_page.patch
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