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Subject[PATCH RFC PKS/PMEM 41/58] drivers/target: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

These kmap() calls in this driver are localized to a single thread. To
avoid the over head of global PKRS updates use the new kmap_thread()
call.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
drivers/target/target_core_iblock.c | 4 ++--
drivers/target/target_core_rd.c | 4 ++--
drivers/target/target_core_transport.c | 4 ++--
3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 1c181d31f4c8..df7b1568edb3 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -415,7 +415,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd)
unsigned char *buf, *not_zero;
int ret;

- buf = kmap(sg_page(sg)) + sg->offset;
+ buf = kmap_thread(sg_page(sg)) + sg->offset;
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
/*
@@ -423,7 +423,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd)
* incoming WRITE_SAME payload does not contain zeros.
*/
not_zero = memchr_inv(buf, 0x00, cmd->data_length);
- kunmap(sg_page(sg));
+ kunmap_thread(sg_page(sg));

if (not_zero)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 408bd975170b..dbbdd39c5bf9 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -159,9 +159,9 @@ static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *
sg_assign_page(&sg[j], pg);
sg[j].length = PAGE_SIZE;

- p = kmap(pg);
+ p = kmap_thread(pg);
memset(p, init_payload, PAGE_SIZE);
- kunmap(pg);
+ kunmap_thread(pg);
}

page_offset += sg_per_table;
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index ff26ab0a5f60..8d0bae5a92e5 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1692,11 +1692,11 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
unsigned char *buf = NULL;

if (sgl)
- buf = kmap(sg_page(sgl)) + sgl->offset;
+ buf = kmap_thread(sg_page(sgl)) + sgl->offset;

if (buf) {
memset(buf, 0, sgl->length);
- kunmap(sg_page(sgl));
+ kunmap_thread(sg_page(sgl));
}
}

--
2.28.0.rc0.12.gb6a658bd00c9
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