LinuxKPI: Added jiffies64_to_msecs for amdkfd compatibility.

[siri_racha.ca]

Summary

jiffies64_to_msec is used by kfd_process.c https://github.com/torvalds/linux/blob/0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53/drivers/gpu/drm/amd/amdkfd/kfd_process.c#L435

Sponsored By: FreeBSD Foundation

[emaste]

Patch does not apply:

$ git arc patch -c D58075
Applying D58075...
 INFO  Base commit is not in local repository; trying to fetch.
Checking patch sys/compat/linuxkpi/common/include/linux/jiffies.h...
error: while searching for:
extern unsigned long jiffies;  /* defined in sys/kern/subr_ticks.S */
#define        jiffies_64              jiffies /* XXX-MJ wrong on 32-bit platforms */
#define        jiffies_to_msecs(x)     ((unsigned int)(((int64_t)(int)(x)) * 1000 / hz))

#define        MAX_JIFFY_OFFSET        ((LONG_MAX >> 1) - 1)


error: patch failed: sys/compat/linuxkpi/common/include/linux/jiffies.h:39
Applying patch sys/compat/linuxkpi/common/include/linux/jiffies.h with 1 reject...
Rejected hunk #1.

 Patch Failed! 
Usage Exception: Unable to apply patch!

It looks like the patch is on top of a version of this file where tabs have been converted to spaces. Can you please re-generate with whitespace unchanged?