Author: kib
Date: Tue Apr 9 17:55:39 2013
New Revision: 249314
URL: http://svnweb.freebsd.org/changeset/base/249314
Log:
Pass the segmented address of the counter, based on %fs, i.e. offset
from the pcpu[0] to the counter base, instead of the linear address.
Modified:
head/sys/i386/include/counter.h
Modified: head/sys/i386/include/counter.h
==============================================================================
--- head/sys/i386/include/counter.h Tue Apr 9 17:43:48 2013
(r249313)
+++ head/sys/i386/include/counter.h Tue Apr 9 17:55:39 2013
(r249314)
@@ -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 i
"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");
}
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