[PATCH RFC PKS/PMEM 49/58] drivers/misc: Utilize new kmap_thread()

[ira.weiny@xxxxxxxxx]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 drivers/misc/vmw_vmci/vmci_queue_pair.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c 
b/drivers/misc/vmw_vmci/vmci_queue_pair.c
index 8531ae781195..f308abb8ad03 100644
--- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
+++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
@@ -343,7 +343,7 @@ static int qp_memcpy_to_queue_iter(struct vmci_queue *queue,
                size_t to_copy;
 
                if (kernel_if->host)
-                       va = kmap(kernel_if->u.h.page[page_index]);
+                       va = kmap_thread(kernel_if->u.h.page[page_index]);
                else
                        va = kernel_if->u.g.vas[page_index + 1];
                        /* Skip header. */
@@ -357,12 +357,12 @@ static int qp_memcpy_to_queue_iter(struct vmci_queue 
*queue,
                if (!copy_from_iter_full((u8 *)va + page_offset, to_copy,
                                         from)) {
                        if (kernel_if->host)
-                               kunmap(kernel_if->u.h.page[page_index]);
+                               kunmap_thread(kernel_if->u.h.page[page_index]);
                        return VMCI_ERROR_INVALID_ARGS;
                }
                bytes_copied += to_copy;
                if (kernel_if->host)
-                       kunmap(kernel_if->u.h.page[page_index]);
+                       kunmap_thread(kernel_if->u.h.page[page_index]);
        }
 
        return VMCI_SUCCESS;
@@ -391,7 +391,7 @@ static int qp_memcpy_from_queue_iter(struct iov_iter *to,
                int err;
 
                if (kernel_if->host)
-                       va = kmap(kernel_if->u.h.page[page_index]);
+                       va = kmap_thread(kernel_if->u.h.page[page_index]);
                else
                        va = kernel_if->u.g.vas[page_index + 1];
                        /* Skip header. */
@@ -405,12 +405,12 @@ static int qp_memcpy_from_queue_iter(struct iov_iter *to,
                err = copy_to_iter((u8 *)va + page_offset, to_copy, to);
                if (err != to_copy) {
                        if (kernel_if->host)
-                               kunmap(kernel_if->u.h.page[page_index]);
+                               kunmap_thread(kernel_if->u.h.page[page_index]);
                        return VMCI_ERROR_INVALID_ARGS;
                }
                bytes_copied += to_copy;
                if (kernel_if->host)
-                       kunmap(kernel_if->u.h.page[page_index]);
+                       kunmap_thread(kernel_if->u.h.page[page_index]);
        }
 
        return VMCI_SUCCESS;
-- 
2.28.0.rc0.12.gb6a658bd00c9