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3b0fde0fac
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13484 Peer reported: | The bug is introduced from kernel 2.6.27, if E820 table reserve the memory | above 4G in 32bit OS(BIOS-e820: 00000000fff80000 - 0000000120000000 | (reserved)), system will report Int 6 error and hang up. The bug is caused by | the following code in drivers/firmware/memmap.c, the resource_size_t is 32bit | variable in 32bit OS, the BUG_ON() will be invoked to result in the Int 6 | error. I try the latest 32bit Ubuntu and Fedora distributions, all hit this | bug. |====== |static int firmware_map_add_entry(resource_size_t start, resource_size_t end, | const char *type, | struct firmware_map_entry *entry) and it only happen with CONFIG_PHYS_ADDR_T_64BIT is not set. it turns out we need to pass u64 instead of resource_size_t for that. [akpm@linux-foundation.org: add comment] Reported-and-tested-by: Peer Chen <pchen@nvidia.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* include/linux/firmware-map.h:
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* Copyright (C) 2008 SUSE LINUX Products GmbH
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* by Bernhard Walle <bernhard.walle@gmx.de>
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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 v2.0 as published by
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* the Free Software Foundation
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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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*/
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#ifndef _LINUX_FIRMWARE_MAP_H
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#define _LINUX_FIRMWARE_MAP_H
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#include <linux/list.h>
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#include <linux/kobject.h>
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/*
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* provide a dummy interface if CONFIG_FIRMWARE_MEMMAP is disabled
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*/
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#ifdef CONFIG_FIRMWARE_MEMMAP
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int firmware_map_add(u64 start, u64 end, const char *type);
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int firmware_map_add_early(u64 start, u64 end, const char *type);
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#else /* CONFIG_FIRMWARE_MEMMAP */
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static inline int firmware_map_add(u64 start, u64 end, const char *type)
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{
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return 0;
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}
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static inline int firmware_map_add_early(u64 start, u64 end, const char *type)
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{
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return 0;
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}
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#endif /* CONFIG_FIRMWARE_MEMMAP */
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#endif /* _LINUX_FIRMWARE_MAP_H */
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