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Commit 2d684cd6 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: remove X2 workaround 



With the spurious handler fix, the X2 does not lock up anymore.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d8b57bb7

arch/x86/mm/pageattr.c

+0 −11
Original line number Diff line number Diff line
@@ -260,17 +260,6 @@ try_preserve_large_page(pte_t *kpte, unsigned long address, 
	pgprot_t old_prot, new_prot;

	int level, do_split = 1;



	/*

	 * An Athlon 64 X2 showed hard hangs if we tried to preserve

	 * largepages and changed the PSE entry from RW to RO.

	 *

	 * As AMD CPUs have a long series of erratas in this area,

	 * (and none of the known ones seem to explain this hang),

	 * disable this code until the hang can be debugged:

	 */

	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)

		return 1;



	spin_lock_irqsave(&pgd_lock, flags);

	/*

	 * Check for races, another CPU might have split this page