[PATCH v3 01/32] arm64: lib: Annotate {clear, copy}_page() as position-independent

Quentin Perret
2021-03-03T17:32:52Z

From: Will Deacon <will@kernel.org>

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: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
---
arch/arm64/lib/clear_page.S | 4 ++--
arch/arm64/lib/copy_page.S | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/lib/clear_page.S b/arch/arm64/lib/clear_page.S
index 073acbf02a7c..b84b179edba3 100644
--- a/arch/arm64/lib/clear_page.S
+++ b/arch/arm64/lib/clear_page.S
@@ -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)
diff --git a/arch/arm64/lib/copy_page.S b/arch/arm64/lib/copy_page.S
index e7a793961408..29144f4cd449 100644
--- a/arch/arm64/lib/copy_page.S
+++ b/arch/arm64/lib/copy_page.S
@@ -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)