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-rw-r--r--include/asm-x86/pgtable.h15
-rw-r--r--include/asm-x86/pgtable_32.h16
2 files changed, 15 insertions, 16 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index b29a122fc1ff..6452286e71a1 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -155,6 +155,21 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
155 pgprot_val(pgprot)) & __supported_pte_mask); 155 pgprot_val(pgprot)) & __supported_pte_mask);
156} 156}
157 157
158static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
159{
160 pteval_t val = pte_val(pte);
161
162 /*
163 * Chop off the NX bit (if present), and add the NX portion of
164 * the newprot (if present):
165 */
166 val &= _PAGE_CHG_MASK & ~_PAGE_NX;
167 val |= pgprot_val(newprot) & __supported_pte_mask;
168
169 return __pte(val);
170}
171
172
158#endif /* __ASSEMBLY__ */ 173#endif /* __ASSEMBLY__ */
159 174
160#ifdef CONFIG_X86_32 175#ifdef CONFIG_X86_32
diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
index 0aaefdda5158..109dad5e16ee 100644
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -235,22 +235,6 @@ static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
235 235
236#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 236#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
237 237
238static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
239{
240 pte.pte_low &= _PAGE_CHG_MASK;
241 pte.pte_low |= pgprot_val(newprot);
242#ifdef CONFIG_X86_PAE
243 /*
244 * Chop off the NX bit (if present), and add the NX portion of
245 * the newprot (if present):
246 */
247 pte.pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
248 pte.pte_high |= (pgprot_val(newprot) >> 32) & \
249 (__supported_pte_mask >> 32);
250#endif
251 return pte;
252}
253
254/* 238/*
255 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] 239 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
256 * 240 *