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[Xen-merge] fs/gs handling
| To: | xen-merge@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-merge] fs/gs handling |
| From: | Chris Wright <chrisw@xxxxxxxx> |
| Date: | Thu, 11 Aug 2005 19:41:45 -0700 |
| Delivery-date: | Fri, 12 Aug 2005 02:39:53 +0000 |
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Any reason that fs/gs are specifically handled with mov not movl in
these cases?
#define deactivate_mm(tsk, mm) \
- asm("movl %0,%%fs ; movl %0,%%gs": :"r" (0))
+ asm("mov %0,%%fs ; mov %0,%%gs": :"r" (0))
or
+static inline void __prepare_arch_switch(void)
...
+ __asm__ __volatile__ ( "mov %%fs,%0 ; mov %%gs,%1"
+ : "=m" (*(int *)¤t->thread.fs),
+ "=m" (*(int *)¤t->thread.gs));
+ __asm__ __volatile__ ( "mov %0,%%fs ; mov %0,%%gs"
+ : : "r" (0) );
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