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Date: Fri, 01 Feb 2008 17:34:47 +0800 From: "Huang, Ying" <ying.huang@...el.com> To: Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@...e.de> Cc: linux-kernel@...r.kernel.org Subject: [PATCH 1/4] x86: check __supported_pte_mask in set_memory_x/nx This patch adds __supported_pte_mask checking to set_memory_x/nx. Signed-off-by: Huang Ying <ying.huang@...el.com> --- arch/x86/mm/pageattr.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -445,13 +445,21 @@ EXPORT_SYMBOL(set_memory_wb); int set_memory_x(unsigned long addr, int numpages) { - return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_NX)); + if (__supported_pte_mask & _PAGE_NX) + return change_page_attr_clear(addr, numpages, + __pgprot(_PAGE_NX)); + else + return 0; } EXPORT_SYMBOL(set_memory_x); int set_memory_nx(unsigned long addr, int numpages) { - return change_page_attr_set(addr, numpages, __pgprot(_PAGE_NX)); + if (__supported_pte_mask & _PAGE_NX) + return change_page_attr_set(addr, numpages, + __pgprot(_PAGE_NX)); + else + return 0; } EXPORT_SYMBOL(set_memory_nx); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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