The branch main has been updated by bz:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=cc2723370b482b923b2adeac3ad359d485f0bd82

commit cc2723370b482b923b2adeac3ad359d485f0bd82
Author:     Bjoern A. Zeeb <b...@freebsd.org>
AuthorDate: 2021-07-27 15:22:02 +0000
Commit:     Bjoern A. Zeeb <b...@freebsd.org>
CommitDate: 2021-07-28 13:35:34 +0000

    LinuxKPI: add fsleep()
    
    Add fsleep() function now required by rtw88.  This seems to be
    making a decision depending on time to sleep on how to sleep.
    Given our compat framework already is lenient on how long to sleep,
    this is a cut down version.
    
    MFC after:      10 days
    Reviewed by:    hselasky
    Differential Revision: https://reviews.freebsd.org/D31322
---
 sys/compat/linuxkpi/common/include/linux/delay.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/delay.h 
b/sys/compat/linuxkpi/common/include/linux/delay.h
index 1ed9dffed359..c13a1797adf9 100644
--- a/sys/compat/linuxkpi/common/include/linux/delay.h
+++ b/sys/compat/linuxkpi/common/include/linux/delay.h
@@ -76,4 +76,14 @@ usleep_range(unsigned long min, unsigned long max)
 
 extern unsigned int linux_msleep_interruptible(unsigned int ms);
 
+static inline void
+fsleep(unsigned long us)
+{
+
+       if (us < 10)
+               udelay(us);
+       else
+               usleep_range(us, us);
+}
+
 #endif /* _LINUX_DELAY_H_ */
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