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bh=AbQOhTo5qTBDcGKT4ROquEtU01mLpiQKpICJ+GOnoG0=; b=VOa1wiTdSIq90eqXSV+t+SrasyN3UIGZsi5GXtTo+Bu7PVm8INo4S8GnERpuOut37I +AYU+FlZFQUsXuaOQdpE7bXLsYVSHzR/bHx6XZl+kO6Qpm5GTe5AEg38vnkQ+DuX47hA 54kXKZRsZomC9SdFdf26RRZFvb6edp/M2XHV3R3upBOd/VgvWw8wG5ApR7Zy/UFbk2Iy qjO5TO8LPablfIX8WDgT8SFL5tF03LrpH2kU7mrt2zpmdwvsBG+cQPi6oKLVe3oSiv8y LmM9/FQgPx8otJWjPjJ+egCT6bssLF2YquMeb7VTpq2mDG+6FUUBQVtuTBdKEgAuH45k P3uQ== X-Gm-Message-State: AOAM530IfWzejUs7CYS4CMXTTpOPaC4tc0YwtWYyKP3SWsBmvYngCK+L r5Y1F4jdbLhEsuKBf4et9zcOZPTsKUAM X-Google-Smtp-Source: ABdhPJxKe/abaoaQDAN0ud0u087kNQ1v1cFYLoKd692l087a2pLQ0SHZGffvQJSKkW0kxuZW5igSyzEjrCP4 X-Received: from r2d2-qp.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:1652]) (user=qperret job=sendgmr) by 2002:a05:600c:4c11:: with SMTP id d17mr4573540wmp.86.1614697208554; Tue, 02 Mar 2021 07:00:08 -0800 (PST) Date: Tue, 2 Mar 2021 14:59:31 +0000 In-Reply-To: <20210302150002.3685113-1-qperret@google.com> Message-Id: <20210302150002.3685113-2-qperret@google.com> Mime-Version: 1.0 References: <20210302150002.3685113-1-qperret@google.com> X-Mailer: git-send-email 2.30.1.766.gb4fecdf3b7-goog Subject: [PATCH v3 01/32] arm64: lib: Annotate {clear, copy}_page() as position-independent From: Quentin Perret To: catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com Cc: android-kvm@google.com, linux-kernel@vger.kernel.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, tabba@google.com, mark.rutland@arm.com, dbrazdil@google.com, mate.toth-pal@arm.com, seanjc@google.com, qperret@google.com, robh+dt@kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210302_150128_554171_D6ABEE26 X-CRM114-Status: UNSURE ( 8.43 ) X-CRM114-Notice: Please train this message. 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 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)