Messages in this thread Patch in this message | | | Date | Sat, 27 Jun 2009 22:04:09 GMT | From | "tip-bot for H. Peter Anvin" <> | Subject | [tip:x86/urgent] Revert "x86: cap iomem_resource to addressable physical memory" |
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Commit-ID: aadaf6b756031e14c0957aebc63d60f1d9a08524 Gitweb: http://git.kernel.org/tip/aadaf6b756031e14c0957aebc63d60f1d9a08524 Author: H. Peter Anvin <hpa@zytor.com> AuthorDate: Sat, 27 Jun 2009 12:22:27 -0700 Committer: H. Peter Anvin <hpa@zytor.com> CommitDate: Sat, 27 Jun 2009 14:59:07 -0700
Revert "x86: cap iomem_resource to addressable physical memory"
This reverts commit 95ee14e4379c5e19c0897c872350570402014742. Mikael Petterson <mikpe@it.uu.se> reported that at least one of his systems will not boot as a result. We have ruled out the detection algorithm malfunctioning, so it is not a matter of producing the incorrect bitmasks; rather, something in the application of them fails.
Revert the commit until we can root cause and correct this problem.
-stable team: this means the underlying commit should be rejected.
Reported-and-isolated-by: Mikael Petterson <mikpe@it.uu.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <200906261559.n5QFxJH8027336@pilspetsen.it.uu.se> Cc: stable@kernel.org Cc: Grant Grundler <grundler@parisc-linux.org>
--- arch/x86/kernel/cpu/common.c | 3 --- 1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 6b26d4d..f1961c0 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -848,9 +848,6 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c) #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64) numa_add_cpu(smp_processor_id()); #endif - - /* Cap the iomem address space to what is addressable on all CPUs */ - iomem_resource.end &= (1ULL << c->x86_phys_bits) - 1; } #ifdef CONFIG_X86_64
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