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Mercier" , Sumit Semwal , Maxime Ripard , Andrew Davis , Arnd Bergmann , Christian Borntraeger , Sven Schnelle , Andrew Morton , "Mike Rapoport (Microsoft)" , "David Hildenbrand (Arm)" , "Liam R. Howlett" , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] s390: export memory encryption helper functions Message-ID: <20260526125927.6ed8498c@p-imbrenda> In-Reply-To: <20260526102113.2594501-1-arnd@kernel.org> References: <20260526102113.2594501-1-arnd@kernel.org> Organization: IBM X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI2MDA5MiBTYWx0ZWRfXzwgIvSdJkGBv GLjLX1v+PurDD8N+cWAHySNG9ytX0J90HiSbyDvGc1Pxu/uafb+I+FMfbHG+wJE9Q3oZri9CQuI lCpe0QJPNJE8MtG62XLVVWl1jeL8LQwQ2o9dSs3x4vzJfJ5s2jGG/q/iTIzd98yE5mmjwHaCkQO Qulc8mntd5UlNNK4EQQpvEY4nqzvCBiZ68itQjXsudUMPzK1c/dybN9k7pPwXvF9dPGtNwG9rfY IlM9KGeyuvr+pT30uvbxYcPNdajdDo7ZY3iEXU57BAvasAYmkSLnoU+alEPLSyndbZD1pCV+rz6 LxQb08qIWMJPMT+h6UgH8BuOeiuhSkqKEkxIeXaR6Rjs2o9NxHtGnklNe8+w/Qy7Yzoz0ToBCD3 WfgJTRGtH/leQ12spIK8OdTGRlYW//S6x2eaeytUlQ1v5QZhFXJ94rZy0tLIQ2N/9KjAatWWAUg 4uC9lbg08IE+zrY6cMg== X-Authority-Analysis: v=2.4 cv=UtJT8ewB c=1 sm=1 tr=0 ts=6a157d16 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=kj9zAlcOel0A:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=nebloLCbriYy-_gPf0QA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-ORIG-GUID: VDGS-GTp1-JjMYUKbCbJc-4ugl_GyzwI X-Proofpoint-GUID: M8sJtt1rKP0lsroqe6UlTFAIg3_TQJxm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-05-26_02,2026-05-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 adultscore=0 clxscore=1011 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605260092 On Tue, 26 May 2026 12:20:37 +0200 Arnd Bergmann wrote: > From: Arnd Bergmann > > The set_memory_encrypted/set_memory_decrypted functions are exported > on x86 and arm64 but not on s390, which leads to a new build failure > because they are now used in a loadable module: > > ERROR: modpost: "set_memory_encrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! > ERROR: modpost: "set_memory_decrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! > > Export these the same way we do on the other architectures. > > Fixes: fd55edff8a0a ("dma-buf: heaps: system: Turn the heap into a module") > Signed-off-by: Arnd Bergmann Reviewed-by: Claudio Imbrenda > --- > arch/s390/mm/init.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c > index f07168a0d3dd..d589c5e4d388 100644 > --- a/arch/s390/mm/init.c > +++ b/arch/s390/mm/init.c > @@ -124,6 +124,7 @@ int set_memory_encrypted(unsigned long vaddr, int numpages) > } > return 0; > } > +EXPORT_SYMBOL_GPL(set_memory_encrypted); > > int set_memory_decrypted(unsigned long vaddr, int numpages) > { > @@ -135,6 +136,7 @@ int set_memory_decrypted(unsigned long vaddr, int numpages) > } > return 0; > } > +EXPORT_SYMBOL_GPL(set_memory_decrypted); > > /* are we a protected virtualization guest? */ > bool force_dma_unencrypted(struct device *dev)