x86: remove set_kernel_exec()

The SMP trampoline always runs in real mode, so making it executable
in the page tables doesn't make much sense because it executes
before page tables are set up. That was the only user of
set_kernel_exec(). Remove set_kernel_exec().

Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 29 deletions

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 08ba3a14c72c..016c8ccd1d8d 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
 
 /*