x86: ioremap_nocache fix

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This patch fixes a bug of ioremap_nocache. ioremap_nocache() will call
__ioremap() with flags != 0 to do the real work, which will call
change_page_attr_addr() if phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT).
But some pages between 0 ~ end_pfn_map << PAGE_SHIFT are not mapped by
identity map, this will make change_page_attr_addr failed.

This patch is based on latest x86 git and has been tested on x86_64 platform.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Huang, Ying 2008-01-30 13:34:04 +01:00 • committed by Ingo Molnar

parent d2e626f45c

commit 1c17f4d615

1 changed files with 7 additions and 0 deletions

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arch/x86/mm/ioremap_64.c

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