diff options
Diffstat (limited to 'include/asm-i386/system.h')
| -rw-r--r-- | include/asm-i386/system.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h index e940c7c6f..88c8ebc99 100644 --- a/include/asm-i386/system.h +++ b/include/asm-i386/system.h @@ -138,8 +138,8 @@ __asm__("movw %%dx,%0\n\t" \ "d" (limit) \ :"dx") -#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , base ) -#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 ) +#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) ) +#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1)>>12 ) static inline unsigned long _get_base(char * addr) { @@ -215,7 +215,12 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size) return x; } -#define mb() __asm__ __volatile__ ("" : : :"memory") +/* + * Force strict CPU ordering. + * And yes, this is required on UP too when we're talking + * to devices. + */ +#define mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") /* interrupt control.. */ #define __sti() __asm__ __volatile__ ("sti": : :"memory") @@ -288,7 +293,7 @@ __asm__ __volatile__ ("movw %3,0(%2)\n\t" \ "movb $0,6(%2)\n\t" \ "movb %%ah,7(%2)\n\t" \ "rorl $16,%%eax" \ - : "=m"(*(n)) : "a" (addr), "r"(n), "i"(limit), "i"(type)) + : "=m"(*(n)) : "a" (addr), "r"(n), "ir"(limit), "i"(type)) #define set_tss_desc(n,addr) \ _set_tssldt_desc(((char *) (n)),((int)(addr)),235,0x89) |