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Pass the segmented address of the counter, based on %fs, i.e. offset

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from the pcpu[0] to the counter base, instead of the linear address.
This commit is contained in:
Konstantin Belousov 2013-04-09 17:55:39 +00:00
parent 85dcf349c1
commit 706c56e4a9
1 changed files with 3 additions and 1 deletions
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4
sys/i386/include/counter.h
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@ -46,6 +46,8 @@
critical_exit(); \
} while (0)
extern struct pcpu __pcpu[MAXCPU];
static inline void
counter_64_inc_8b(uint64_t *p, int64_t inc)
{
@ -61,7 +63,7 @@ counter_64_inc_8b(uint64_t *p, int64_t inc)
"cmpxchg8b %%fs:(%%esi)\n\t"
"jnz 1b"
:
: "S" (p), "D" (&inc)
: "S" ((char *)p - (char *)&__pcpu[0]), "D" (&inc)
: "memory", "cc", "eax", "edx", "ebx", "ecx");
}