Here's the best patch I've been able to find for this so far. -- see shy jo
--- linux/arch/i386/kernel/apm.c.seg 2005-03-27 13:10:45.000000000 -0800
+++ linux/arch/i386/kernel/apm.c 2005-03-28 10:30:24.000000000 -0800
@@ -327,7 +327,7 @@ extern int (*console_blank_hook)(int);
* Save a segment register away
*/
#define savesegment(seg, where) \
- __asm__ __volatile__("movl %%" #seg ",%0" : "=m" (where))
+ __asm__ __volatile__("mov %%" #seg ",%0" : "=m" (where))
/*
* Maximum number of events stored
@@ -553,7 +553,7 @@ static inline void apm_restore_cpus(unsi
#ifdef APM_ZERO_SEGS
# define APM_DECL_SEGS \
- unsigned int saved_fs; unsigned int saved_gs;
+ unsigned short saved_fs; unsigned short saved_gs;
# define APM_DO_SAVE_SEGS \
savesegment(fs, saved_fs); savesegment(gs, saved_gs)
# define APM_DO_ZERO_SEGS \
--- linux/arch/i386/kernel/process.c.seg 2005-03-27 13:10:45.000000000 -0800
+++ linux/arch/i386/kernel/process.c 2005-03-28 10:30:24.000000000 -0800
@@ -544,7 +544,7 @@ void release_thread(struct task_struct *
* Save a segment.
*/
#define savesegment(seg,value) \
- asm volatile("movl %%" #seg ",%0":"=m" (*(int *)&(value)))
+ asm volatile("mov %%" #seg ",%0":"=m" (value))
int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
unsigned long unused,
@@ -661,8 +661,8 @@ void fastcall __switch_to(struct task_st
* Save away %fs and %gs. No need to save %es and %ds, as
* those are always kernel segments while inside the kernel.
*/
- asm volatile("movl %%fs,%0":"=m" (*(int *)&prev->fs));
- asm volatile("movl %%gs,%0":"=m" (*(int *)&prev->gs));
+ asm volatile("mov %%fs,%0":"=m" (prev->fs));
+ asm volatile("mov %%gs,%0":"=m" (prev->gs));
/*
* Restore %fs and %gs.
--- linux/arch/x86_64/kernel/process.c.seg 2005-03-27 13:10:51.000000000 -0800
+++ linux/arch/x86_64/kernel/process.c 2005-03-28 11:16:57.000000000 -0800
@@ -527,10 +527,10 @@ int copy_thread(int nr, unsigned long cl
p->thread.fs = me->thread.fs;
p->thread.gs = me->thread.gs;
- asm("movl %%gs,%0" : "=m" (p->thread.gsindex));
- asm("movl %%fs,%0" : "=m" (p->thread.fsindex));
- asm("movl %%es,%0" : "=m" (p->thread.es));
- asm("movl %%ds,%0" : "=m" (p->thread.ds));
+ asm("mov %%gs,%0" : "=m" (p->thread.gsindex));
+ asm("mov %%fs,%0" : "=m" (p->thread.fsindex));
+ asm("mov %%es,%0" : "=m" (p->thread.es));
+ asm("mov %%ds,%0" : "=m" (p->thread.ds));
unlazy_fpu(current);
p->thread.i387 = current->thread.i387;
@@ -575,11 +575,11 @@ struct task_struct *__switch_to(struct t
/*
* Switch DS and ES.
*/
- asm volatile("movl %%es,%0" : "=m" (prev->es));
+ asm volatile("mov %%es,%0" : "=m" (prev->es));
if (unlikely(next->es | prev->es))
loadsegment(es, next->es);
- asm volatile ("movl %%ds,%0" : "=m" (prev->ds));
+ asm volatile ("mov %%ds,%0" : "=m" (prev->ds));
if (unlikely(next->ds | prev->ds))
loadsegment(ds, next->ds);
@@ -588,7 +588,7 @@ struct task_struct *__switch_to(struct t
*/
{
unsigned fsindex;
- asm volatile("movl %%fs,%0" : "=g" (fsindex));
+ asm volatile("movl %%fs,%0" : "=r" (fsindex));
/* segment register != 0 always requires a reload.
also reload when it has changed.
when prev process used 64bit base always reload
@@ -609,7 +609,7 @@ struct task_struct *__switch_to(struct t
}
{
unsigned gsindex;
- asm volatile("movl %%gs,%0" : "=g" (gsindex));
+ asm volatile("movl %%gs,%0" : "=r" (gsindex));
if (unlikely((gsindex | next->gsindex) || prev->gs)) {
load_gs_index(next->gsindex);
if (gsindex)
--- linux/include/asm-i386/system.h.seg 2005-03-27 15:33:12.000000000 -0800
+++ linux/include/asm-i386/system.h 2005-03-28 10:30:24.000000000 -0800
@@ -84,7 +84,7 @@ static inline unsigned long _get_base(ch
#define loadsegment(seg,value) \
asm volatile("\n" \
"1:\t" \
- "movl %0,%%" #seg "\n" \
+ "mov %0,%%" #seg "\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\t" \
@@ -96,7 +96,7 @@ static inline unsigned long _get_base(ch
".align 4\n\t" \
".long 1b,3b\n" \
".previous" \
- : :"m" (*(unsigned int *)&(value)))
+ : :"m" (value))
/*
* Clear and set 'TS' bit respectively
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