On Mon, 21 Mar 2022 16:44:45 +0100, Christophe Leroy wrote:

Aligning address to page boundary allows flush_tlb_kernel_range()
to know it's a single page flush and use tlbie instead of tlbia.

On 603 we now have the following code in first leg of
change_page_attr():

	  2c:	55 29 00 3c 	rlwinm  r9,r9,0,0,30
	  30:	91 23 00 00 	stw     r9,0(r3)
	  34:	7c 00 22 64 	tlbie   r4,r0
	  38:	7c 00 04 ac 	hwsync
	  3c:	38 60 00 00 	li      r3,0
	  40:	4e 80 00 20 	blr

[...]

Applied to powerpc/next.

[1/1] powerpc: align address to page boundary in change_page_attr()
      https://git.kernel.org/powerpc/c/65883b78bc9f49ac891bb202c59fcb76b9cfc611

cheers