git: f9413897cb84 - main - linuxkpi: Add down_write_nest_lock

The branch main has been updated by manu:

URL: https://cgit.FreeBSD.org/src/commit/?id=f9413897cb84499c76be140312e6ef2d24488040

commit f9413897cb84499c76be140312e6ef2d24488040
Author:     Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2022-03-22 09:28:02 +0000
Commit:     Emmanuel Vadot <manu@FreeBSD.org>
CommitDate: 2022-03-23 13:37:53 +0000

    linuxkpi: Add down_write_nest_lock
    
    Simply calls down_write like in Linux (when CONFIG_DEBUG_LOCK_ALLOC isn't
    specified)
    Needed by drm v5.10
    
    MFC after:      1 month
    Reviewed by:    hselasky
    Sponsored by:   Beckhoff Automation GmbH & Co. KG
    Differential Revision:  https://reviews.freebsd.org/D34642
---
 sys/compat/linuxkpi/common/include/linux/rwsem.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/rwsem.h b/sys/compat/linuxkpi/common/include/linux/rwsem.h
index 1e9eae79dbb8..fc3580bc186e 100644
--- a/sys/compat/linuxkpi/common/include/linux/rwsem.h
+++ b/sys/compat/linuxkpi/common/include/linux/rwsem.h
@@ -51,6 +51,7 @@ struct rw_semaphore {
 #define	downgrade_write(_rw)		sx_downgrade(&(_rw)->sx)
 #define	down_read_nested(_rw, _sc)	down_read(_rw)
 #define	init_rwsem(_rw)			linux_init_rwsem(_rw, rwsem_name("lnxrwsem"))
+#define	down_write_nest_lock(sem, _rw)	down_write(_rw)
 
 #ifdef WITNESS_ALL
 /* NOTE: the maximum WITNESS name is 64 chars */