linux-kernel - [PATCH V1 4/7] accel/amdxdna: Use rcu_access_pointer for _

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Message-ID: <20250102212244.1586340-4-lizhi.hou@amd.com>
Date: Thu, 2 Jan 2025 13:22:41 -0800
From: Lizhi Hou <lizhi.hou@....com>
To: <ogabbay@...nel.org>, <quic_jhugo@...cinc.com>,
	<dri-devel@...ts.freedesktop.org>
CC: Lizhi Hou <lizhi.hou@....com>, <linux-kernel@...r.kernel.org>,
	<min.ma@....com>, <max.zhen@....com>, <sonal.santan@....com>,
	<king.tam@....com>, <mario.limonciello@....com>, kernel test robot
	<lkp@...el.com>
Subject: [PATCH V1 4/7] accel/amdxdna: Use rcu_access_pointer for __rcu pointer

Use rcu_access_pointer for pid in struct drm_file. This fixes sparse
warning.

Fixes: be462c97b7df ("accel/amdxdna: Add hardware context")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202412311210.LfeHTzLw-lkp@intel.com/
Signed-off-by: Lizhi Hou <lizhi.hou@....com>
---
 drivers/accel/amdxdna/amdxdna_pci_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c b/drivers/accel/amdxdna/amdxdna_pci_drv.c
index 194e44fc243d..97d4a032171f 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.c
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c
@@ -61,7 +61,7 @@ static int amdxdna_drm_open(struct drm_device *ddev, struct drm_file *filp)
 		goto put_rpm;
 	}
 
-	client->pid = pid_nr(filp->pid);
+	client->pid = pid_nr(rcu_access_pointer(filp->pid));
 	client->xdna = xdna;
 
 	client->sva = iommu_sva_bind_device(xdna->ddev.dev, current->mm);
-- 
2.34.1