git: 1fbf4377a410 - stable/13 - linuxkpi: Introduce tasklet_disable_nosync()

[Neel Chauhan]

The branch stable/13 has been updated by nc (ports committer):

URL: https://cgit.FreeBSD.org/src/commit/?id=1fbf4377a41096cc1a0fa46b35f7afb4ed21ee98

commit 1fbf4377a41096cc1a0fa46b35f7afb4ed21ee98
Author:     Neel Chauhan <nc at FreeBSD.org>
AuthorDate: 2021-04-28 15:05:57 +0000
Commit:     Neel Chauhan <nc at FreeBSD.org>
CommitDate: 2021-05-01 00:55:47 +0000

    linuxkpi: Introduce tasklet_disable_nosync()
    
    This is needed for the drm-kmod 5.5 update.
    
    Reviewed by:            hselasky (src)
    Differential Revision:  https://reviews.freebsd.org/D30024
    
    (cherry picked from commit 9781105bea58b8bce53ba766850c5f023b34c43c)
---
 sys/compat/linuxkpi/common/include/linux/interrupt.h | 1 +
 sys/compat/linuxkpi/common/src/linux_tasklet.c       | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/interrupt.h b/sys/compat/linuxkpi/common/include/linux/interrupt.h
index ca26cd24ffda..fc1241240b39 100644
--- a/sys/compat/linuxkpi/common/include/linux/interrupt.h
+++ b/sys/compat/linuxkpi/common/include/linux/interrupt.h
@@ -208,6 +208,7 @@ extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *,
     unsigned long data);
 extern void tasklet_enable(struct tasklet_struct *);
 extern void tasklet_disable(struct tasklet_struct *);
+extern void tasklet_disable_nosync(struct tasklet_struct *);
 extern int tasklet_trylock(struct tasklet_struct *);
 extern void tasklet_unlock(struct tasklet_struct *);
 extern void tasklet_unlock_wait(struct tasklet_struct *ts);
diff --git a/sys/compat/linuxkpi/common/src/linux_tasklet.c b/sys/compat/linuxkpi/common/src/linux_tasklet.c
index 5cac8ffd994c..9a4c01737466 100644
--- a/sys/compat/linuxkpi/common/src/linux_tasklet.c
+++ b/sys/compat/linuxkpi/common/src/linux_tasklet.c
@@ -227,6 +227,13 @@ tasklet_disable(struct tasklet_struct *ts)
 	tasklet_unlock_wait(ts);
 }
 
+void
+tasklet_disable_nosync(struct tasklet_struct *ts)
+{
+	atomic_inc(&ts->count);
+	barrier();
+}
+
 int
 tasklet_trylock(struct tasklet_struct *ts)
 {