diff options
| -rw-r--r-- | arch/x86/kernel/smpboot_32.c | 11 | ||||
| -rw-r--r-- | arch/x86/mm/init_32.c | 29 | ||||
| -rw-r--r-- | include/asm-x86/pgtable_32.h | 12 |
3 files changed, 0 insertions, 52 deletions
diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index 7a62dce..5787a0c 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -107,7 +107,6 @@ u8 apicid_2_node[MAX_APICID]; extern const unsigned char trampoline_data []; extern const unsigned char trampoline_end []; static unsigned char *trampoline_base; -static int trampoline_exec; static void map_cpu_to_logical_apicid(void); @@ -139,10 +138,6 @@ void __init smp_alloc_memory(void) */ if (__pa(trampoline_base) >= 0x9F000) BUG(); - /* - * Make the SMP trampoline executable: - */ - trampoline_exec = set_kernel_exec((unsigned long)trampoline_base, 1); } /* @@ -1290,12 +1285,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus) setup_ioapic_dest(); #endif zap_low_mappings(); -#ifndef CONFIG_HOTPLUG_CPU - /* - * Disable executability of the SMP trampoline: - */ - set_kernel_exec((unsigned long)trampoline_base, trampoline_exec); -#endif } void __init smp_intr_init(void) diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 08ba3a1..016c8cc 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -529,35 +529,6 @@ static void __init set_nx(void) } } -/* - * Enables/disables executability of a given kernel page and - * returns the previous setting. - */ -int __init set_kernel_exec(unsigned long vaddr, int enable) -{ - pte_t *pte; - int ret = 1; - int level; - - if (!nx_enabled) - goto out; - - pte = lookup_address(vaddr, &level); - BUG_ON(!pte); - - if (!pte_exec(*pte)) - ret = 0; - - if (enable) - pte->pte_high &= ~(1 << (_PAGE_BIT_NX - 32)); - else - pte->pte_high |= 1 << (_PAGE_BIT_NX - 32); - pte_update_defer(&init_mm, vaddr, pte); - __flush_tlb_all(); -out: - return ret; -} - #endif /* diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h index 9381bd3..72eb06c 100644 --- a/include/asm-x86/pgtable_32.h +++ b/include/asm-x86/pgtable_32.h @@ -184,18 +184,6 @@ static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) */ extern pte_t *lookup_address(unsigned long address, int *level); -/* - * Make a given kernel text page executable/non-executable. - * Returns the previous executability setting of that page (which - * is used to restore the previous state). Used by the SMP bootup code. - * NOTE: this is an __init function for security reasons. - */ -#ifdef CONFIG_X86_PAE - extern int set_kernel_exec(unsigned long vaddr, int enable); -#else - static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;} -#endif - #if defined(CONFIG_HIGHPTE) #define pte_offset_map(dir, address) \ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address)) |