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Fri, 11 Sep 2026 00:04:28 -0700 (PDT) Date: Fri, 11 Sep 2026 07:03:41 +0000 In-Reply-To: <20260911070346.801948-1-morbo@google.com> Mime-Version: 1.0 References: <20260911070346.801948-1-morbo@google.com> X-Mailer: git-send-email 2.55.0.1032.g73a4cd73de-goog Message-ID: <20260911070346.801948-4-morbo@google.com> Subject: [PATCH 3/7] arm64/word-at-a-time: Instrument load_unaligned_zeropad() From: Bill Wendling To: linux-kernel@vger.kernel.org Cc: Bill Wendling , Catalin Marinas , Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260911_000430_190714_C8308C1E X-CRM114-Status: GOOD ( 13.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland 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 + #endif /* __ASM_WORD_AT_A_TIME_H */ -- 2.47.3