From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
To improve debugging abilities, especially invalid option
asserts.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
---
fs/Kconfig | 3 +++
include/linux/iomap.h | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/fs/Kconfig b/fs/Kconfig
index bfb1c6095c7a..4bed5df9b55f 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -19,6 +19,9 @@ if BLOCK
config FS_IOMAP
bool
+config FS_IOMAP_DEBUG
+ bool "Debugging for the iomap code"
+ depends on FS_IOMAP
source "fs/ext2/Kconfig"
source "fs/ext4/Kconfig"
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index bc499ceae392..209b6c93674e 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -18,6 +18,17 @@ struct page;
struct vm_area_struct;
struct vm_fault;
+#ifdef CONFIG_FS_IOMAP_DEBUG
+#define iomap_assert(expr) \
+ if(!(expr)) { \
+ printk( "Assertion failed! %s,%s,%s,line=%d\n",\
+#expr,__FILE__,__func__,__LINE__); \
+ BUG(); \
+ }
+#else
+#define iomap_assert(expr)
+#endif
+
/*
* Types of block ranges for iomap mappings:
*/
--
2.16.4
