It was mistakenly removed by coan. Add it back and also with a new
Kconfig option to enable it.
Signed-off-by: Peng Tao <tao.peng@xxxxxxx>
Signed-off-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>
---
.../lustre/include/linux/libcfs/libcfs_private.h | 9 +++++++++
drivers/staging/lustre/lustre/Kconfig | 10 ++++++++++
2 files changed, 19 insertions(+)
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
index c4f5907..056caa4 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
@@ -72,7 +72,16 @@ do { \
#define LASSERT(cond) LASSERTF(cond, "\n")
+#ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
+/**
+ * This is for more expensive checks that one doesn't want to be enabled all
+ * the time. LINVRNT() has to be explicitly enabled by
+ * CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK option.
+ */
+# define LINVRNT(exp) LASSERT(exp)
+#else
# define LINVRNT(exp) ((void)sizeof!!(exp))
+#endif
#define KLASSERT(e) LASSERT(e)
diff --git a/drivers/staging/lustre/lustre/Kconfig b/drivers/staging/lustre/lustre/Kconfig
index d0a0e08..ab3e126 100644
--- a/drivers/staging/lustre/lustre/Kconfig
+++ b/drivers/staging/lustre/lustre/Kconfig
@@ -31,3 +31,13 @@ config LUSTRE_OBD_MAX_IOCTL_BUFFER
applications can pass to Lustre kernel module through ioctl interface.
If unsure, use default.
+
+config LUSTRE_DEBUG_EXPENSIVE_CHECK
+ bool "Enable Lustre DEBUG checks"
+ depends on LUSTRE_FS
+ default false
+ help
+ This option is mainly for debug purpose. It enables Lustre code to do
+ expensive checks that may have a performance impact.
+
+ Use with caution. If unsure, say N.
--
1.7.9.5
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