* [dpdk-stable] [PATCH v2] kni: fix build with Linux 5.9
[not found] <20200817103051.1552870-1-ferruh.yigit@intel.com>
@ 2020-08-17 10:32 ` Ferruh Yigit
2020-09-29 10:41 ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
0 siblings, 1 reply; 2+ messages in thread
From: Ferruh Yigit @ 2020-08-17 10:32 UTC (permalink / raw)
To: dev; +Cc: Ferruh Yigit, stable
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(+)
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;
--
2.25.4
^ permalink raw reply [flat|nested] 2+ messages in thread