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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=2AvxqWsiNZiBgTFedPJYPTYC/iX22/lJxd+Fe6flKw0=; b=mE+zWfmTwZTftE8bDw9bcBvGsltoke9eC4qC0ZYOf6Uk1UUoGuCu/Yc9vZj0TwgP9m NdVW1auWH8lE4Dermn55ra9RCjTM/cQMDxCKAQjgaAFAAqj8ZSqDNbT06/XQed4+v7Ee qFM3rOVm4c1OEzGXBbT+YoN2xR3NUAWPhxta4KXie+eQ0JRgsY7hSROC+qx8t506n+PB 9kwjuvximenF96Fzexmxfs3wNrbeKDcdXdyaKtxddtbzRDXjpbXYTkjD67l//wZtKsvT fKp3HhuVxZqeS0sY3VLytmGYPHPu2ewh179sps1hDPo7FhKr+eRYoAJf3THArlp68noF P6HQ== X-Gm-Message-State: AOAM530s6NarUEPMucEkjl6zX+phYHYzOg+5tBu3Kz2skq4DjjhqYynI rO9El0TbwRO7Fr3BKUdGskrmV1IpyYzd X-Google-Smtp-Source: ABdhPJyf1ctEy51fuFCix0vOeWng0452zHo1A6Dfvf1j1eurJXucg7DaQIxlCVhea+1iolch1bleRN20EdPf X-Received: from r2d2-qp.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:1652]) (user=qperret job=sendgmr) by 2002:a1c:2c89:: with SMTP id s131mr1783892wms.0.1610108128579; Fri, 08 Jan 2021 04:15:28 -0800 (PST) Date: Fri, 8 Jan 2021 12:14:59 +0000 In-Reply-To: <20210108121524.656872-1-qperret@google.com> Message-Id: <20210108121524.656872-2-qperret@google.com> Mime-Version: 1.0 References: <20210108121524.656872-1-qperret@google.com> X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog Subject: [RFC PATCH v2 01/26] arm64: lib: Annotate {clear, copy}_page() as position-independent From: Quentin Perret To: Catalin Marinas , Will Deacon , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Rob Herring , Frank Rowand X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210108_071536_293013_5C331674 X-CRM114-Status: GOOD ( 10.65 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, android-kvm@google.com, linux-kernel@vger.kernel.org, Fuad Tabba , David Brazdil , kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Will Deacon 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 Signed-off-by: Quentin Perret --- 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) -- 2.30.0.284.gd98b1dd5eaa7-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel