Zachary Amsden
2007-Apr-18 17:49 UTC
[PATCH 10/21] i386 Use protected segment for 16bit stack
Use prepare_protected_segment macro to set up the 16-bit stack. Whee!! This code is almost readable now. Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.14-zach-work/arch/i386/kernel/cpu/common.c ==================================================================--- linux-2.6.14-zach-work.orig/arch/i386/kernel/cpu/common.c 2005-11-04 16:54:45.000000000 -0800 +++ linux-2.6.14-zach-work/arch/i386/kernel/cpu/common.c 2005-11-05 00:28:08.000000000 -0800 @@ -607,10 +607,8 @@ void __devinit cpu_init(void) set_base(gdt[GDT_ENTRY_BAD_BIOS_CACHE], __va(BAD_BIOS_AREA)); /* Set up GDT entry for 16bit stack */ - *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |- ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) | - ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) | - (CPU_16BIT_STACK_SIZE - 1); + prepare_protected_segment(cpu, GDT_ENTRY_ESPFIX_SS, (void *) stk16_off, + CPU_16BIT_STACK_SIZE); cpu_gdt_descr[cpu].size = GDT_SIZE - 1; cpu_gdt_descr[cpu].address = (unsigned long)gdt;