[PATCH 3/7] arm64/word-at-a-time: Instrument load_unaligned_zeropad()

[Bill Wendling <morbo@google.com>]

Convert arm64 to the arch_load_unaligned_zeropad() /
load_unaligned_zeropad() split introduced for x86 in the previous
patch, so KASAN/KCSAN also see reads through load_unaligned_zeropad()
on this architecture (e.g. under CONFIG_KASAN_SW_TAGS).

Assisted-by: Claude:claude-sonnet-5
Signed-off-by: Bill Wendling <morbo@google.com>
---
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 arch/arm64/include/asm/word-at-a-time.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/word-at-a-time.h b/arch/arm64/include/asm/word-at-a-time.h
index 824ca6987a51..656e3274ed7a 100644
--- a/arch/arm64/include/asm/word-at-a-time.h
+++ b/arch/arm64/include/asm/word-at-a-time.h
@@ -47,7 +47,7 @@ static inline unsigned long zero_bytemask(unsigned long bits)
  * and the next page not being mapped, take the exception and
  * return zeroes in the non-existing part.
  */
-static inline unsigned long load_unaligned_zeropad(const void *addr)
+static inline unsigned long arch_load_unaligned_zeropad(const void *addr)
 {
 	unsigned long ret;
 
@@ -66,4 +66,6 @@ static inline unsigned long load_unaligned_zeropad(const void *addr)
 	return ret;
 }
 
+#include <asm-generic/word-at-a-time-instrumented.h>
+
 #endif /* __ASM_WORD_AT_A_TIME_H */
-- 
2.47.3