On Sun, 20 Dec 2020 18:18:26 +0000 (UTC), Christophe Leroy wrote:

Force inlining of get_tb() in order to avoid getting
following function in vdso32, leading to suboptimal
performance in clock_gettime()

00000688 <.get_tb>:
 688:	7c 6d 42 a6 	mftbu   r3
 68c:	7c 8c 42 a6 	mftb    r4
 690:	7d 2d 42 a6 	mftbu   r9
 694:	7c 03 48 40 	cmplw   r3,r9
 698:	40 e2 ff f0 	bne+    688 <.get_tb>
 69c:	4e 80 00 20 	blr

Applied to powerpc/fixes.

[1/1] powerpc/time: Force inlining of get_tb()
      https://git.kernel.org/powerpc/c/0faa22f09caadc11af2aa7570870ebd2ac5b8170

cheers