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Mercier" , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Ritesh Harjani , Shrikanth Hegde , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Kiryl Shutsemau , Rick Edgecombe , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Paolo Bonzini , Vitaly Kuznetsov , Andy Lutomirski , Peter Zijlstra , dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v8 13/14] mm: Assert CoCo shared allocations may sleep Date: Thu, 24 Sep 2026 15:35:28 +0530 Message-ID: <20260924100529.1398790-14-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260924100529.1398790-1-aneesh.kumar@kernel.org> References: <20260924100529.1398790-1-aneesh.kumar@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: pmosu3wk1m5o86d4gk76gjxo5ka81ho9 X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 7BFCD1C000B X-HE-Tag: 1790244570-212630 X-HE-Meta: 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 TgOO4epB INoq/qHpwCi7XLU83getQuR5SUZIL77UiCgwAY8oWLiFckGrT83CBg+XNbMGtPYm6qa/SWLekk06w99Ehasu1r5ShKVRgKK7GYiqApZnlir6vdyMEulG83kp4ywePIMZgfrESn0g4sF6xDaBowz+uZGC2+hXgH5dHp96tFHdrt/ahlDh5EORPZ22ogLQmHq8etU1dDotg5S7u5M51MMAmVbmc8Sr19aFskBTGTAS/+URQVVhsI2cFSTxTOCuqa6DNMr3gwW2Og7BadN1iVqQ0aVAFtn7nENV1vYZRq7OHYI71Ic0vDZ9X6Kkk1ywnPyKcx8Rs2CksYqdlZncLBdidjov0/itHkiWV8QstY5rUZYz9NQOxLtZhuknbdshDtmXtgBKPRgHX59jf7rk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On platforms with memory encryption, alloc_cc_shared_pages_node() transitions the allocated memory to the shared state. set_memory_decrypted() may sleep, so the transition must run from a sleepable context. Cc: Andrew Morton Signed-off-by: Aneesh Kumar K.V (Arm) --- mm/cc_shared.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/cc_shared.c b/mm/cc_shared.c index 9eb79832a702..6f68a3f44ef8 100644 --- a/mm/cc_shared.c +++ b/mm/cc_shared.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -106,6 +107,8 @@ static int __alloc_cc_shared_pages_node(int nid, gfp_t gfp, unsigned int order; int ret; + might_sleep(); + ret = cc_shared_calc_layout(requested, &layout); if (ret) return ret; -- 2.43.0