---

yaml
---
r: 80465
b: refs/heads/master
c: 934d158
h: refs/heads/master
i:
  80463: 8684268
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1e8e23bc469a11fc190a6bace857075d83dc2555
+refs/heads/master: 934d15854d04e8ca2495d8f5698164df990d5d66

trunk/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)

trunk/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
 
 /*

trunk/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))