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| author | David S. Miller <davem@davemloft.net> | 2005-08-29 21:46:22 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-08-29 21:46:22 +0200 |
| commit | 4f07118f656c179740cad35b827032e2e29b1210 (patch) | |
| tree | 7ddeb17346fe25ae75aa5373659c053afb9ef5f5 /arch/sparc64/kernel/sparc64_ksyms.c | |
| parent | [SPARC64]: Make debugging spinlocks usable again. (diff) | |
| download | linux-4f07118f656c179740cad35b827032e2e29b1210.tar.xz linux-4f07118f656c179740cad35b827032e2e29b1210.zip | |
[SPARC64]: More fully work around Spitfire Errata 51.
It appears that a memory barrier soon after a mispredicted
branch, not just in the delay slot, can cause the hang
condition of this cpu errata.
So move them out-of-line, and explicitly put them into
a "branch always, predict taken" delay slot which should
fully kill this problem.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/sparc64_ksyms.c')
| -rw-r--r-- | arch/sparc64/kernel/sparc64_ksyms.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c index 0764b9330784..a3ea697f1adb 100644 --- a/arch/sparc64/kernel/sparc64_ksyms.c +++ b/arch/sparc64/kernel/sparc64_ksyms.c @@ -406,3 +406,12 @@ EXPORT_SYMBOL(xor_vis_4); EXPORT_SYMBOL(xor_vis_5); EXPORT_SYMBOL(prom_palette); + +/* memory barriers */ +EXPORT_SYMBOL(mb); +EXPORT_SYMBOL(rmb); +EXPORT_SYMBOL(wmb); +EXPORT_SYMBOL(membar_storeload); +EXPORT_SYMBOL(membar_storeload_storestore); +EXPORT_SYMBOL(membar_storeload_loadload); +EXPORT_SYMBOL(membar_storestore_loadstore); |