Allow a bts index equal to max. We don't know how the hardware implements
the index wrap-around.
Signed-off-by: Markus Metzger <[email protected]>
---
Index: git-tip/arch/x86/kernel/ds_selftest.c
===================================================================
--- git-tip.orig/arch/x86/kernel/ds_selftest.c 2009-03-20 14:05:51.000000000 +0100
+++ git-tip/arch/x86/kernel/ds_selftest.c 2009-03-20 14:05:56.000000000 +0100
@@ -47,8 +47,13 @@
printk(KERN_CONT "bad bts buffer setup...");
error = -1;
}
+ /*
+ * We allow top in [begin; end], since its not clear when the
+ * overflow adjustment happens: after the increment or before the
+ * write.
+ */
if ((trace->ds.top < trace->ds.begin) ||
- (trace->ds.end <= trace->ds.top)) {
+ (trace->ds.end < trace->ds.top)) {
printk(KERN_CONT "bts top out of bounds...");
error = -1;
}
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