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x86: remove set_kernel_exec()

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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>
This commit is contained in:
Andi Kleen
2008-01-30 13:33:53 +01:00
committed by Ingo Molnar
parent 1e8e23bc46
commit 934d15854d
3 changed files with 0 additions and 52 deletions
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29
arch/x86/mm/init_32.c
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@@ -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
/*