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Howlett" , Lyude Paul , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, dri-devel@lists.freedesktop.org, Ke Sun , Alvin Sun X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788278954; l=891; i=sunke@kylinos.cn; s=20260317; h=from:subject:message-id; bh=qqWFYnkUdOvaxzK249OpGaOu6UGHYSzktFTqj4uM+pI=; b=oHWDNasF+q42cZjuP7Vyzw0DKfYfsrBz1qiLDguWG+DGqzqQ2c8I3XwHLkj5Nv7tFARXpDbIw aU+eSOJuPDQDe41AF9ZIFWnYyr5WukFdVIFMSsNJps+nQQeVcfZydmr X-Developer-Key: i=sunke@kylinos.cn; a=ed25519; pk=CHcwQp8GSoj25V/L1ZWNSQjWp9eSIb0s9LKr0Nm3WuE= X-Endpoint-Received: by B4 Relay for sunke@kylinos.cn/20260317 with auth_id=950 X-Original-From: Ke Sun Reply-To: sunke@kylinos.cn X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 44CBB4000E X-Stat-Signature: sdeigiyewtd3t94mqnmz3wkfztan3pan X-HE-Tag: 1788278958-142141 X-HE-Meta: U2FsdGVkX19GgtuoWKgIKjw7TLAnmb9hPm015ARavMXsUuMMjkIzXGtA4nlx8etcoWo09Dq2CUN4mo5oCIuKJLs4w1rEBxNHDdS/nt8Ugcak3WhaRce9ViJGAgRvsWvZ9oyjV2tgA/Mp9avZzHmXPHjTKA2VkLmkOXczc0a0MhZjhFr3Xodsh/KH3NgPnF/Z1JBoYz21OcITl+3KHU0tq811DSdw04LYMu/eviXT33rLPgOck5kpU1E05JvNBD8AW49mw6Qq/ivZxdMyHgeX2o3ESKfD46l3T8sX+udSjJoCCHXm9Gbf35eahenyZpUoVOxX8w8ZQ5Vvkufubb9DkimZbu8zsE5cj9QK29qfi75qvXIsTjOZjp+ObDwH7AwLObqfiq2LmNYbhCj2SYsVxMn3ZvdK08mtMuvpPiEUICMZQUsILA+2ijpKYMsqwZzCMEWfwaVIlukLcHR8ZGPFkCEcFw6/RfJWj7UFjkP0fsAKyn9GF3oo8Yr93dV87+wCWZTwz0l3OMkyVEyJkQcTvr9Jpgk+GxmsubnqrDxmGKNm7ci9ZZQVzatkMQIMDA2GH21VproMcT8k2RqU/H3AAZHijyAIQ1pyw48jy1Gv+2mmJAY2iKTye36Tun0hFwXKOlikAkB9qg2be+UELf+O+zzJ1DTZjlMcF57JXlKccr77ovgkm7d/H+xbwYsuHDaPSPpXa4jtcp/tjFhabw9qkjuby4H5tfblr7RYImTHzJH7k5iIQk3Oy+3N8kuoe0QkXu/8PLmIH+93CsTl/Ors2Da64Y0Sm/Ptj1ohDSLHnSSx9r6zWr5LURRNT47uK9tSxrmQnILsHSWAIqDYapmiXoRrC3lfopyKfX9A7+d/5de7FNoto2XZstwAE9N+K/nsp97W6ynJI3T8k8V8k/e2BNO+Fv670eSad/5MYJSbjMHOEanxOFcQI7ztilhjD2D3wEGgp8QCQpcOeTV/RWs Wcpi9bEw bKVi1V+3uEQUEowWcVFIDpzG5YCNCd3XwiJPm3P8X/7sTbZlsywR6cRc7WoTfdasvBR/llDk/ACJd9WuDhFNh+8Ru0/NQiABTSFqKHOJMbWiXtKW0rhpbxJIITdRPwOIVmSNtjCtYe6/dNim2FRwc9Mnxi8EwDH2+xU4BDtYTZTQG3pPUlpzhv+cEO02JIXtjUNU3Uvek5JBkjU1v6kc2MgET3aQnM22fD2hxE8/opRkvsYckhJ6tfaF0bgIjDKlYYGw1iAmcg+JxKfQR5I901f65skscbmzUudXUw+nP27XF1l3DnjlVzMvzGpZ8+i5ur+Qg8ShalUqXiq9CaW+f9R2YZImdsnWVpAWGuj6mDmonqsEj7slx3nRu9/mmHZ55RA1QWQbHCcBItpduohEqHszS9YXoaAyjUXYFLR+SVD8D/u0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Alvin Sun Expose the task's address space size. It is used by the Tyr driver for splitting a VM's GPU address space into user and kernel regions. Signed-off-by: Alvin Sun --- rust/kernel/mm.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/mm.rs b/rust/kernel/mm.rs index 4764d7b68f2a7..d2dfbb7d43972 100644 --- a/rust/kernel/mm.rs +++ b/rust/kernel/mm.rs @@ -149,6 +149,13 @@ pub fn mmget_not_zero(&self) -> Option> { None } } + + /// The size of the process virtual address space. + #[inline] + pub fn task_size(&self) -> usize { + // SAFETY: `self.as_raw()` is a valid pointer to an `mm_struct` per the type invariants. + unsafe { (*self.as_raw()).__bindgen_anon_1.task_size } + } } // These methods require `mm_users` to be non-zero. -- 2.43.0