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Mon, 20 May 2019 07:29:46 -0700 (PDT) Subject: Re: [PATCH] arch64: export __flush_dcache_area To: Catalin Marinas References: <20190517200012.136519-1-salyzyn@android.com> <20190517215303.3daebi7o66we2cjh@mbp> From: Mark Salyzyn Message-ID: <735fc46d-69a4-6b65-f0f7-a09c2be438a8@android.com> Date: Mon, 20 May 2019 07:29:46 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190517215303.3daebi7o66we2cjh@mbp> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190520_072949_058438_2BE7EA32 X-CRM114-Status: GOOD ( 15.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , kernel-team@android.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 05/17/2019 02:53 PM, Catalin Marinas wrote: > On Fri, May 17, 2019 at 12:59:56PM -0700, Mark Salyzyn wrote: >> Some (out of tree modular) drivers feel a need to ensure >> data is flushed to the DDR before continuing flow. >> >> Signed-off-by: Mark Salyzyn >> Cc: linux-kernel@vger.kernel.org >> Cc: kernel-team@android.com >> --- >> arch/arm64/mm/cache.S | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S >> index a194fd0e837f..70d7cb5c0bd2 100644 >> --- a/arch/arm64/mm/cache.S >> +++ b/arch/arm64/mm/cache.S >> @@ -120,6 +120,7 @@ ENTRY(__flush_dcache_area) >> dcache_by_line_op civac, sy, x0, x1, x2, x3 >> ret >> ENDPIPROC(__flush_dcache_area) >> +EXPORT_SYMBOL_GPL(__flush_dcache_area) >> >> /* >> * __clean_dcache_area_pou(kaddr, size) > NAK. Such drivers are doing something wrong, there is a dedicated > in-kernel API for that handles kernel maintenance (hint: DMA). Thanks! -- Mark _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel