add driver 5G

hc

2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2

 kernel/drivers/misc/sgi-gru/grufile.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * SN Platform GRU Driver
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  *
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@@ -6,21 +7,8 @@
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  * This file supports the user system call for file open, close, mmap, etc.
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  * This also incudes the driver initialization code.
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  *
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+ *  (C) Copyright 2020 Hewlett Packard Enterprise Development LP
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  *  Copyright (c) 2008-2014 Silicon Graphics, Inc.  All Rights Reserved.
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License as published by
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- *  the Free Software Foundation; either version 2 of the License, or
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- *  (at your option) any later version.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; if not, write to the Free Software
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- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
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  */
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 #include <linux/module.h>
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@@ -148,7 +136,7 @@
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 	if (!(req.options & GRU_OPT_MISS_MASK))
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 		req.options |= GRU_OPT_MISS_FMM_INTR;
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-	down_write(&current->mm->mmap_sem);
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+	mmap_write_lock(current->mm);
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 	vma = gru_find_vma(req.gseg);
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 	if (vma) {
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 		vdata = vma->vm_private_data;
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@@ -159,7 +147,7 @@
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 		vdata->vd_tlb_preload_count = req.tlb_preload_count;
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 		ret = 0;
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 	}
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-	up_write(&current->mm->mmap_sem);
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+	mmap_write_unlock(current->mm);
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 	return ret;
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 }
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@@ -529,7 +517,7 @@
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 #if defined CONFIG_IA64
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 	gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */
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 #else
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-	gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
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+	gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG) &
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 				0x7fffffffffffUL;
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 #endif
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 	gru_start_vaddr = __va(gru_start_paddr);
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@@ -586,6 +574,7 @@
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 	gru_free_tables();
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 	misc_deregister(&gru_miscdev);
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 	gru_proc_exit();
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+	mmu_notifier_synchronize();
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 }
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 static const struct file_operations gru_fops = {