]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
x86: ioremap_nocache fix
authorHuang, Ying <ying.huang@intel.com>
Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)
committerIngo Molnar <mingo@elte.hu>
Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)
commit1c17f4d615f34a4ecfcf9132d643126b226f5e79
treef621a6370b60a48a62b52e49f38d8b8f6f6b3590
parentd2e626f45cc450c00f5f98a89b8b4c4ac3c9bf5f
x86: ioremap_nocache fix

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>
arch/x86/mm/ioremap_64.c