diff options
author | Jakub Jelinek <jakub@redhat.com> | 2006-04-24 08:55:46 +0000 |
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committer | Jakub Jelinek <jakub@redhat.com> | 2006-04-24 08:55:46 +0000 |
commit | d0145e03799e484f3a53d79de3b3f34162ee9d3c (patch) | |
tree | d8c51a0952204f9015de0db3319d4c820e8646e0 /nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h | |
parent | f5ce81c94cc27035f44d37bffa7f7e08dbce7631 (diff) |
Updated to fedora-glibc-20060424T0820
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h index fcc1240fef..abd019df47 100644 --- a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h @@ -110,7 +110,21 @@ # define __lll_rel_instr "" #else # define __lll_acq_instr "isync" -# define __lll_rel_instr "sync" +# ifdef _ARCH_PWR4 +/* + * Newer powerpc64 processors support the new "light weight" sync (lwsync) + * So if the build is using -mcpu=[power4,power5,power5+,970] we can + * safely use lwsync. + */ +# define __lll_rel_instr "lwsync" +# else +/* + * Older powerpc32 processors don't support the new "light weight" + * sync (lwsync). So the only safe option is to use normal sync + * for all powerpc32 applications. + */ +# define __lll_rel_instr "sync" +# endif #endif /* Set *futex to ID if it is 0, atomically. Returns the old value */ |