On Tue, 2009-08-04 at 01:12 +0800, tip-bot for Paul Mackerras wrote: > Commit-ID: 19157af82cf0575032386f60378527904dbb7b8f > Gitweb: http://git.kernel.org/tip/19157af82cf0575032386f60378527904dbb7b8f > Author: Paul Mackerras <paulus@xxxxxxxxx> > AuthorDate: Mon, 3 Aug 2009 22:38:10 +1000 > Committer: H. Peter Anvin <hpa@xxxxxxxxx> > CommitDate: Mon, 3 Aug 2009 08:09:59 -0700 > > x86: Make 64-bit efi_ioremap use ioremap on MMIO regions > > Booting current 64-bit x86 kernels on the latest Apple MacBook > (MacBook5,2) via EFI gives the following warning: > > [ 0.182209] ------------[ cut here ]------------ > [ 0.182222] WARNING: at arch/x86/mm/pageattr.c:581 __cpa_process_fault+0x44/0xa0() This patch does not really fix the issue. __cpa_process_fault will warn if target memory area is beyond max_pfn_mapped. EFI runtime RAM area beyond max_pfn_mapped will trigger the warning too. To fix the issue. I think we can loose the restriction of __cpa_process_fault a little. Add a global variable max_pfn, which is max pfn of all memory type (including RAM, RESERVED, etc, mapped or unmapped), and __cpa_process_fault warns for memory area beyond max_pfn only. Best Regards, Huang Ying -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|