Commit 8d990205 authored by Will Deacon's avatar Will Deacon Committed by Marc Zyngier
Browse files

arm64: lib: Annotate {clear, copy}_page() as position-independent 



clear_page() and copy_page() are suitable for use outside of the kernel
address space, so annotate them as position-independent code.

Signed-off-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarQuentin Perret <qperret@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-2-qperret@google.com
parent a1baa01f

arch/arm64/lib/clear_page.S

+2 −2
Original line number Diff line number Diff line
@@ -14,7 +14,7 @@ 
 * Parameters:

 *	x0 - dest

 */

SYM_FUNC_START(clear_page)

SYM_FUNC_START_PI(clear_page)

	mrs	x1, dczid_el0

	and	w1, w1, #0xf

	mov	x2, #4
@@ -25,5 +25,5 @@ SYM_FUNC_START(clear_page) 
	tst	x0, #(PAGE_SIZE - 1)

	b.ne	1b

	ret

SYM_FUNC_END(clear_page)

SYM_FUNC_END_PI(clear_page)

EXPORT_SYMBOL(clear_page)

arch/arm64/lib/copy_page.S

+2 −2
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
 *	x0 - dest

 *	x1 - src

 */

SYM_FUNC_START(copy_page)

SYM_FUNC_START_PI(copy_page)

alternative_if ARM64_HAS_NO_HW_PREFETCH

	// Prefetch three cache lines ahead.

	prfm	pldl1strm, [x1, #128]
@@ -75,5 +75,5 @@ alternative_else_nop_endif 
	stnp	x16, x17, [x0, #112 - 256]



	ret

SYM_FUNC_END(copy_page)

SYM_FUNC_END_PI(copy_page)

EXPORT_SYMBOL(copy_page)