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authorDavid S. Miller <davem@davemloft.net>2009-02-05 23:59:04 -0800
committerDavid S. Miller <davem@davemloft.net>2009-02-05 23:59:04 -0800
commit1c2f61d40b691789626489fa947a3e003c9a84be (patch)
treef9129cd1ed8f769b13c4de440d716cf4afb24a59 /arch/sparc/kernel/pcr.c
parentdc4ff585ffbc6cb0c872697b2d5f42293a32e5c8 (diff)
sparc64: Don't hook up pcr_ops on spitfire chips.
They can't be used for profiling and NMI watchdog currently since they lack the counter overflow interrupt. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/pcr.c')
-rw-r--r--arch/sparc/kernel/pcr.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 92e0dda141a..1ae8cdd7e70 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -133,11 +133,16 @@ int __init pcr_arch_init(void)
case cheetah:
case cheetah_plus:
- case spitfire:
pcr_ops = &direct_pcr_ops;
pcr_enable = PCR_SUN4U_ENABLE;
break;
+ case spitfire:
+ /* UltraSPARC-I/II and derivatives lack a profile
+ * counter overflow interrupt so we can't make use of
+ * their hardware currently.
+ */
+ /* fallthrough */
default:
err = -ENODEV;
goto out_unregister;