[PATCH RFC PKS/PMEM 47/58] drivers/mtd: Utilize new kmap_thread()
From: <hidden>
Date: 2020-10-09 19:57:38
Also in:
amd-gfx, bpf, ceph-devel, dri-devel, intel-gfx, intel-wired-lan, io-uring, kexec, kvm, linux-bcache, linux-block, linux-btrfs, linux-cifs, linux-doc, linux-efi, linux-ext4, linux-f2fs-devel, linux-fsdevel, linux-kselftest, linux-mm, linux-mmc, linux-nfs, linux-rdma, linux-scsi, linux-um, lkml, netdev, nvdimm, target-devel, xen-devel
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
From: Ira Weiny <redacted> These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Richard Weinberger <richard@nod.at> Cc: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Ira Weiny <redacted> --- drivers/mtd/mtd_blkdevs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 0c05f77f9b21..4b18998273fa 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c@@ -88,14 +88,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr, return BLK_STS_IOERR; return BLK_STS_OK; case REQ_OP_READ: - buf = kmap(bio_page(req->bio)) + bio_offset(req->bio); + buf = kmap_thread(bio_page(req->bio)) + bio_offset(req->bio); for (; nsect > 0; nsect--, block++, buf += tr->blksize) { if (tr->readsect(dev, block, buf)) { - kunmap(bio_page(req->bio)); + kunmap_thread(bio_page(req->bio)); return BLK_STS_IOERR; } } - kunmap(bio_page(req->bio)); + kunmap_thread(bio_page(req->bio)); rq_flush_dcache_pages(req); return BLK_STS_OK; case REQ_OP_WRITE:
@@ -103,14 +103,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr, return BLK_STS_IOERR; rq_flush_dcache_pages(req); - buf = kmap(bio_page(req->bio)) + bio_offset(req->bio); + buf = kmap_thread(bio_page(req->bio)) + bio_offset(req->bio); for (; nsect > 0; nsect--, block++, buf += tr->blksize) { if (tr->writesect(dev, block, buf)) { - kunmap(bio_page(req->bio)); + kunmap_thread(bio_page(req->bio)); return BLK_STS_IOERR; } } - kunmap(bio_page(req->bio)); + kunmap_thread(bio_page(req->bio)); return BLK_STS_OK; default: return BLK_STS_IOERR;
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2.28.0.rc0.12.gb6a658bd00c9