Author: kib
Date: Tue Aug 15 09:44:18 2017
New Revision: 322534
URL: https://svnweb.freebsd.org/changeset/base/322534
Log:
MFC r322456:
On i386 with CPUID but without SSE2, set lfence_works to LMB_NONE
instead of looping.
Modified:
stable/11/lib/libc/x86/sys/__vdso_gettc.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/lib/libc/x86/sys/__vdso_gettc.c
==============================================================================
--- stable/11/lib/libc/x86/sys/__vdso_gettc.c Tue Aug 15 09:40:57 2017
(r322533)
+++ stable/11/lib/libc/x86/sys/__vdso_gettc.c Tue Aug 15 09:44:18 2017
(r322534)
@@ -101,6 +101,7 @@ init_fence(void)
#if defined(__i386__)
u_int cpuid_supported, p[4];
+ lfence_works = LMB_NONE;
__asm __volatile(
" pushfl\n"
" popl %%eax\n"
@@ -121,8 +122,7 @@ init_fence(void)
cpuidp(0x1, p);
if ((p[3] & CPUID_SSE2) != 0)
lfence_works = select_lmb();
- } else
- lfence_works = LMB_NONE;
+ }
#elif defined(__amd64__)
lfence_works = select_lmb();
#else
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