[v2] kni: fix build with Linux 5.9
diff mbox series

Message ID 20200817103247.1564204-1-ferruh.yigit@intel.com
State Accepted
Delegated to: Thomas Monjalon
Headers show
Series
  • [v2] kni: fix build with Linux 5.9
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Checks

Context Check Description
ci/Intel-compilation success Compilation OK
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/checkpatch success coding style OK

Commit Message

Ferruh Yigit Aug. 17, 2020, 10:32 a.m. UTC 
Starting from Linux 5.9 'get_user_pages_remote()' API doesn't get
'struct task_struct' parameter:
commit 64019a2e467a ("mm/gup: remove task_struct pointer for all gup code")

The change reflected to the KNI with version check.

Cc: stable@dpdk.org

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
v2:
* Add stable tag to request backport.
---
 kernel/linux/kni/compat.h  | 4 ++++
 kernel/linux/kni/kni_dev.h | 5 +++++
 2 files changed, 9 insertions(+)

Comments

Thomas Monjalon Sept. 29, 2020, 10:41 a.m. UTC | #1 
> Starting from Linux 5.9 'get_user_pages_remote()' API doesn't get
> 'struct task_struct' parameter:
> commit 64019a2e467a ("mm/gup: remove task_struct pointer for all gup code")
> 
> The change reflected to the KNI with version check.
> 
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

Applied, thanks

Patch
diff mbox series 

diff --git a/kernel/linux/kni/compat.h b/kernel/linux/kni/compat.h
index 9ee45dbf6f..d515b27669 100644
--- a/kernel/linux/kni/compat.h
+++ b/kernel/linux/kni/compat.h
@@ -134,3 +134,7 @@ 
 #if KERNEL_VERSION(5, 6, 0) <= LINUX_VERSION_CODE
 #define HAVE_TX_TIMEOUT_TXQUEUE
 #endif
+
+#if KERNEL_VERSION(5, 9, 0) > LINUX_VERSION_CODE
+#define HAVE_TSK_IN_GUP
+#endif
diff --git a/kernel/linux/kni/kni_dev.h b/kernel/linux/kni/kni_dev.h
index ca5f92a47b..c15da311ba 100644
--- a/kernel/linux/kni/kni_dev.h
+++ b/kernel/linux/kni/kni_dev.h
@@ -101,8 +101,13 @@  static inline phys_addr_t iova_to_phys(struct task_struct *tsk,
 	offset = iova & (PAGE_SIZE - 1);
 
 	/* Read one page struct info */
+#ifdef HAVE_TSK_IN_GUP
 	ret = get_user_pages_remote(tsk, tsk->mm, iova, 1,
 				    FOLL_TOUCH, &page, NULL, NULL);
+#else
+	ret = get_user_pages_remote(tsk->mm, iova, 1,
+				    FOLL_TOUCH, &page, NULL, NULL);
+#endif
 	if (ret < 0)
 		return 0;