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[PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management

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i386 inline assembler cleanup.

This change encapsulates descriptor and task register management.  Also,
it is possible to improve assembler generation in two cases; savesegment
may store the value in a register instead of a memory location, which
allows GCC to optimize stack variables into registers, and MOV MEM, SEG
is always a 16-bit write to memory, making the casting in math-emu
unnecessary.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Zachary Amsden
2005-09-03 15:56:38 -07:00
committed by Linus Torvalds
parent 245067d167
commit 4d37e7e3fd
11 changed files with 43 additions and 40 deletions
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4
arch/i386/kernel/cpu/common.c
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@@ -613,8 +613,8 @@ void __devinit cpu_init(void)
memcpy(thread->tls_array, &per_cpu(cpu_gdt_table, cpu),
GDT_ENTRY_TLS_ENTRIES * 8);
__asm__ __volatile__("lgdt %0" : : "m" (cpu_gdt_descr[cpu]));
__asm__ __volatile__("lidt %0" : : "m" (idt_descr));
load_gdt(&cpu_gdt_descr[cpu]);
load_idt(&idt_descr);
/*
* Delete NT