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x86: Remove unused patch_espfix_desc() 

patch_espfix_desc() is not used after commit
dc4c2a0aed

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090718150955.GB11294@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Akinobu Mita 2009-07-19 00:09:56 +09:00 committed by Ingo Molnar
parent 254e0a6bff
commit fde0312d01
2 changed files with 1 additions and 24 deletions
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4
arch/x86/include/asm/traps.h
View File

@ -81,9 +81,7 @@ extern int panic_on_unrecovered_nmi;
void math_error(void __user *);
void math_emulate(struct math_emu_info *);
#ifdef CONFIG_X86_32
unsigned long patch_espfix_desc(unsigned long, unsigned long);
#else
#ifndef CONFIG_X86_32
asmlinkage void smp_thermal_interrupt(void);
asmlinkage void mce_threshold_interrupt(void);
#endif

21
arch/x86/kernel/traps.c
View File

@ -786,27 +786,6 @@ do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
#endif
}
#ifdef CONFIG_X86_32
unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
{
struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
unsigned long base = (kesp - uesp) & -THREAD_SIZE;
unsigned long new_kesp = kesp - base;
unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
__u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
/* Set up base for espfix segment */
desc &= 0x00f0ff0000000000ULL;
desc |= ((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
((((__u64)base) << 32) & 0xff00000000000000ULL) |
((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
(lim_pages & 0xffff);
*(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
return new_kesp;
}
#endif
asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
{
}