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Define CK_MD_TSO for the relevant arches (i386, amd64 and sparc64).

Browse source 
Defaulting to CK_MD_RMO has the unfortunate side effect of generating
memory barriers that are useless on those arches, and the even more
unfortunate side effect of generating lfence/sfence/mfence on i386, even
if older CPUs don't support it.
This should fix the panic reported when using IPFW on a Pentium 3.
Note that mfence and sfence might still be used in a few case, but that
shouldn't happen in FreeBSD right now, and should be fixed upstream first.

MFC after:	1 week
This commit is contained in:
Olivier Houchard 2018-02-16 17:50:06 +00:00
parent 901d96e3fb
commit a72c9dc53f
1 changed files with 9 additions and 4 deletions
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13
sys/contrib/ck/include/ck_md.h
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@ -53,10 +53,6 @@
#define CK_PR_DISABLE_DOUBLE
#endif /* CK_PR_DISABLE_DOUBLE */
#ifndef CK_MD_RMO
#define CK_MD_RMO
#endif /* CK_MD_RMO */
#define CK_VERSION "0.6.0"
#define CK_GIT_SHA ""
@ -65,11 +61,20 @@
*/
#if defined(__i386__) && !defined(__x86__)
#define __x86__
#define CK_MD_TSO
#elif defined(__amd64__)
#define CK_MD_TSO
#elif defined(__sparc64__) && !defined(__sparcv9__)
#define __sparcv9__
#define CK_MD_TSO
#elif defined(__powerpc64__) && !defined(__ppc64__)
#define __ppc64__
#elif defined(__powerpc__) && !defined(__ppc__)
#define __ppc__
#endif
#if !defined(CK_MD_RMO) && !defined(CK_MD_TSO) && !defined(CK_MD_PSO)
#define CK_MD_RMO
#endif
#endif /* CK_MD_H */